Which of the following is not a branch of physics?
Statistics
Optics
Electronics
What is a light year a unit of?
Distance
Time
Intensity of illumination
What is the Pascal a unit of?
Pressure
Viscosity
Strain
What is the S.I. unit of temperature?
Kelvin
Degree Celsius
Celsius
What is an electron volt the unit of?
Energy
Charge
Electronic power
Which of the following is not used as a unit of length?
Radian
Micron
Light year
What is the unit for the quantity of matter?
Mol
Kg
Amu
What is one horse power equal to?
746 watt
746 megawatt
746 kilowatt
Einstein was awarded the Nobel Prize for his work on which of the following?
The photoelectric effect
The theory of relativity
The theory of gravitation
Who discovered the principle of inertia?
Galileo
Kepler
Newton
Which is the smallest planet in the solar system?
Mercury
Venus
Earth
Who invented the wireless telegraph?
Marconi
Maxwell
Hertz
Which of the following is not the name of a physical quantity?
Kilogram
Density
Impulse
What is the unit of power?
Watt
Kelvin
Hertz
What is the unit of radioactivity?
Curie
Volt
Pascal
What is heat?
Energy in transit
Kinetic energy of molecules
Potential and kinetic energy of molecules
What is the S.I. unit for a quantity of heat?
Joule
Calorie
Kilocalorie
What is the direction of flow of heat between two bodies determined by?
The difference in their temperature
Kinetic energy
Internal energy
In a pressure cooker, the cooking is faster because the increase of vapor pressure does what?
Increases boiling point
Increases latent heat
Decreases boiling point
What does the amount of heat that flows through a wall not depend upon?
Average temperature
Thickness
Material
What is the normal temperature of an average human body?
37 degrees Celsius
97 degrees Celsius
37 degrees Fahrenheit
What is the boiling point of water?
It depends on atmospheric pressure
Always 100 degrees Celsius
It depends on the material of the container
From what do we get energy directly?
The Sun
Ocean
Atmosphere
As water freezes, what happens to its temperature?
Does not change
Decreases
Increases
For a given liquid, what does the rate of evaporation not depend on?
The quantity of the liquid
The temperature of the liquid
The surface area of the container
What is thermal radiation?
Electromagnetic waves
Mechanical transverse waves
Mechanical longitudinal waves
What is the absorption coefficient of thermal radiation for a perfectly black body?
More than one
Less than one
One
Which of the following instruments is used to measure the temperature of the source from its thermal radiation?
Thermopile
Thermometer
Bolometer
Thermal radiations are similar to what?
X-rays
Gamma rays
Beta rays
The absorptive power of a body depends upon which of the following?
The nature of the body
Surface area
The time of observation
Specific heat depends on which of the following?
The nature of the material
The mass of the material
The temperature of the material
What is a process in which the volume remains constant called?
Isochoric
Isobaric
Isothermal
What is the process whereby the molecules of different substances move randomly called?
Diffusion
Osmosis
Capillarity
Which of the following is the best container for gas during an isothermal process?
Copper vessel
Glass vessel
Wood vessel
Which of the following is the best container for gas during an adiabatic process?
Thermos flask
Glass vessel
Wood vessel
What is the internal energy of a perfect gas independent of?
Temperature
Pressure
Volume
The internal energy of a real gas does not depend on which quantity?
Pressure
Temperature
Volume
Which of the following states of matter has two specific heats?
Gas
Solid
Liquid
For the same mass, which of the following has maximum thermal capacity?
Water
Copper
Wood
In which stroke is the useful work done in a petrol engine?
Expansion
Compression
Exhaust
How many dead centers are there in one cycle of a steam engine?
2
3
4
Which of the following, at 100 degrees Celsius, causes the most severe burns?
Steam
Water
Oil
The color of an extremely hot star should be what?
Blue
Yellow
Red
What does altering a variable resistor on a circuit do?
It effects the current flow
It does not effect the resistance
It does not effect the current flow
What is the fixed point used for the Kelvin scale?
Triple point
Ice point
Steam point
On what does the adiabatic bulk elasticity depend?
Atomicity and pressure
Pressure and volume
Volume and atomicity
When an iron ball is heated, which of the following attributes increases by the highest percentage?
Volume
Diameter
Area
Which of the following is an isentropic process?
Adiabatic
Isothermal
Isobaric
What does hydrometry deal with the measurement of?
The amount of water vapor in the air
The density of water vapor in the air
The amount of water and air
The temperature inside a room is raised with the help of an electric heater. What happens to the relative humidity?
Decreases
Increases
Unchanged
Of what is the first law of thermodynamics a special case?
The law of conservation of energy
Charles law
The law of conservation of mass
What does the letter 'A' stand for in the acronym LASER?
Amplification
Amplitude
Alternating
Light waves can be polarized because they are:
Transverse
Reflected
Longitudinal
Which of the following is not a thermodynamic function?
Work done
Enthalpy
Entropy
In what is Boyle's law applicable?
An Isothermal process
An Isochoric process
An Isobaric process
Most particles have a corresponding antiparticle with exactly the same mass. Which of the following particles does not have a distinct antiparticle?
Photon
Neutron
Electron
In which process is the rate of transfer of heat at its maximum?
Radiation
Conduction
Convection
A gas is being compressed adiabatically. What is the specific heat of the gas during compression?
Zero
Infinite
Undefined
What does thermal conductivity depend upon?
The nature of the material
The heat produced
The difference in temperature
On what does the internal energy per mole of gas depend?
Temperature
Viscosity
Thermal conductivity
On what is a Thermocouple thermometer based?
The law of thermodynamics
The Pettier effect
The Photoelectric effect
How does heat travel through a vacuum?
By radiation
By conduction
By convection
What is the device used to measure very high temperatures called?
Pyrometer
Bolometer
Calorimeter
If we remove the atmosphere from the Earth how would it affect the duration of a day?
It would decrease
It would increase
It would remain the same
The presence of a gravitational field is required for heat transfer by:
Natural convection
Conduction
Radiation
What does the letter 'S' stand for in the acronym LASER?
Stimulated
Saturated
Steady
In what can the process of convection not take place?
Solids
Liquid
Gases
An isochoric process takes place at:
Constant volume
Constant entropy
Constant pressure
Which surfaces are the best absorbers of radiation?
Dark dull surfaces
Light shiny surfaces
Light dull surfaces
In a cyclic process, what is the change in internal energy of a system?
Zero
Minimum but not zero
Infinite
What is the internal energy of a perfect gas independent of?
Time
Volume
Temperature
Which of these radiations is totally absorbed by the atmosphere?
Gamma rays
Infrared
Microwaves
The relationship between the color and the temperature of a star is given by:
Wien's displacement law
Hubble law
Planck law
What is the green house effect caused by?
Infrared rays
UV rays
Gamma rays
Which of the following is not a function of state?
Work
Temperature
Pressure
What is the heat given to a body which raises its temperature by 1 degree Celsius called?
Thermal capacity
Latent heat
Specific heat
A thermoelectric refrigerator works on:
The Peltier effect
Joule effect
Thermionic emission
Which law does a constant volume gas thermometer work on?
Charles law
Boyle's law
Pascal law
What are Newton's laws of cooling used for the determination of?
Latent heat of solids
Specific heat of solids
Latent heat of liquids
Good absorbers of heat are:
Non emitters
Poor emitters
Good emitters
Which electromagnetic radiation provides the energy for photosynthesis?
Light
Temperature
Pressure
On what does the thermal conductivity of a metal depend?
The nature of the metal
The area of cross section
The volume of the metal
In which of the following processes is thermal conduction at its maximum?
Conduction
Convection
Radiation
Which of the following instruments is used in the measurement of temperatures above 2000 degrees Celsius?
Gas thermometer
Pyrometer
Bolometer
What is the specific heat of a gas in an isothermal process?
Infinity
Zero
Remains constant
The image of an object formed in a plain mirror:
Is virtual
Is real
Is invisible
What type of mirror can be used to obtain the real image of an object?
Concave mirror
Plain mirror
Convex mirror
What type of mirror does a motorist use for the rear view?
Convex mirror
Concave mirror
Cylindrical mirror
What type of mirror is used in car headlamps?
A cylindrical mirror
A concave mirror
A convex mirror
The Sun remains visible for some time after it actually sets below the horizon. Why does this happen?
Atmospheric refraction
Scattering of light
Dispersion
Which part of the Sun is visible during total solar eclipse?
Corona
No part
Photosphere
Why do the Sun and the Moon appear elliptical near the horizon?
An optical illusion
Interference
Actual change in shapes
A rainbow is formed by the __________ of light by water droplets?
Dispersion and total interval reflection
Refraction
Scattering
After a shower of rain a rainbow is seen:
Opposite the Sun
Towards the Sun
Anywhere irrespective of the position of the Sun
Which of the following is the correct sequence of colors in a rainbow?
Red, Orange, Yellow
Orange, Red, Yellow
Red, Yellow, Orange
What are primary colors?
Colors which cannot be produced by mixing other colors
Colors which can only be produced by mixing other colors
Color found in nature
Which of the following is not a primary color?
Orange
Red
Blue
What parts of a human eye give light perception and vision, including color differentiation and the perception of depth?
Rods and cones
Cubes and spheres
Film and aperture
On what principle does an Endoscope, used by a doctor for examination of the inside of a patient's stomach, work?
Total reflection of light
Dispersion of light
Refraction of light
What is the part of the human eye which performs a function similar to that of an aperture in a photographic camera called?
The pupil
The iris
The lens
Why is the inside of a photographic camera coated black?
To avoid the reflection of light
To avoid the scattering of light
To avoid the absorption of light
What does the pupil of the eye adjust automatically for?
The amount of light
Color
Object size
What is color related to?
Frequency
Amplitude
Quality
Which of the following pairs of light rays has the widest separation in the spectrum of white light?
Blue and red
Green and yellow
Indigo and violet
All the colors on the TV screen are produced from a combination of which colors?
Red, green and blue
Red, yellow and orange
Blue, green and yellow
What is the failure of light to travel in a straight line known as?
Diffraction
Dispersion
Refraction
What is the nature of the wave associated with a parallel beam of light?
Plane
Spherical
Elliptical
The angle of minimum deviation of a ray of light through a glass prism is greatest for which color?
Violet
Orange
Yellow
Which of the following has the greater wave length?
Radio waves
Microwaves
Gamma ray
Which of the following waves cannot be polarized?
Sound waves
Radio waves
Transverse waves
For sustained interference you need sources which emit radiation:
With a constant phase difference
With same intensity
With same amplitude
What does the angle of minimum deviation of a prism depend upon?
Angle of incidence
Angle of reflection
Angle of prism
Which of the following is affected when light waves interfere?
Intensity
Amplitude
Phase
Which of the following is not essential for the formation of a pure spectrum?
Screen
Narrow beam of light
Parallel beam of light
Which of the following cannot produce color with white light?
Polarization
Dispersion
Diffraction
Which of the following is essential for observing diffraction?
A narrow slit
Two coherent sources
A screen
What happens to light energy during interference?
It get redistributed
It is created at the maxima
It is destroyed at the minima
In a vacuum, the speed of light:
Is constant
Depends upon wavelength
Depends upon Color
If an image is formed by a plane mirror, which of the following is not true?
It is real
It is erect
It is at the same distance as the object
A magnifying glass which is used to produce a magnified image of an object has a:
Convex lens
Concave lens
Convex mirror
Which of the following can produce a virtual image larger in size than the object?
Convex lens
Concave lens
Convexo concave lens
Just before setting, the Sun may appear to be elliptical. Why does this happen?
Because of refraction
Because of reflection
Because of dispersion
For which color is the angle of deviation the least?
Red
Violet
Blue
What is the distance between the crest of one wave and the crest of the next wave called?
Wavelength
Frequency
Amplitude
In a prism, dispersive power depends on:
Material of prism
Angle of prism
Shape of prism
What differentiates red light from blue light?
Frequency
Velocity in vacuum
Intensity
Why do some cars have yellow tinted headlights?
Yellow light produces the least dazzling effect
Yellow light is not scattered
To save power
Which of the following provides the warmth in sunlight?
Infrared rays
Visible light
Ultraviolet rays
What causes chromatic aberration?
Variation of focal length with color
Paraxial rays
Difference in the curvature of the lens surface
What does the infrared spectrum lie between?
Microwaves and visible light
Radio waves and microwaves
Ultraviolet and X-rays
What color does a blue colored object seen in sodium light appear to be?
Black
White
Violet
Among the different colors in white light, which color is scattered the most?
Blue
Red
Green
What controls the amount of light reaching the retina of the eye?
The iris
The pupil
The cilliary muscle
What is the far point of a normal human eye?
Infinity
15 cm
1 m
Where is the image of a distant object formed by a short sighted eye?
In front of retina
In a blind spot
Behind the retina
What is the ability of the eye to see objects at all distances called?
Accommodation
Binocular vision
Myopia
What is the image formed by a microscope?
Virtual and magnified
Real and magnified
Virtual and diminished
What happens to the magnifying powers of a microscope as its length increases?
It increases
It decreases
It remains unchanged
What does a spherical bubble in water behave as?
Concave lens
Convex lens
Concave mirror
Which one of the following phenomena is not explained by Huygen's construction of a wave front?
Origin of spectrum
Refraction
Diffraction
What can Huygen's wave theory of light not explain?
The photoelectric effect
Diffraction
Interference
Why does the sky appear blue?
Because blue light is scattered the most
Because blue light is absorbed
Because it is its natural color
When light travels from one medium to another which characteristic does not change?
Frequency
Velocity
Wavelength
What is the Fraunhofer spectrum?
A line absorption spectrum
A band absorption spectrum
A line emission spectrum
In which one of the following regions of the electromagnetic spectrum will the vibration motion of molecules give rise to an absorption spectrum?
Microwaves
Ultraviolet
Infrared
How many satellites does Saturn have?
23
21
19
Why do light waves projected onto an oil surface show seven colors?
Because of Interference
Because of Polarization
Because of Refraction
Which of the following contains all possible frequencies from a high to low frequency range?
Continuous spectrum
Band spectrum
Line spectrum
If a star is moving towards Earth, what color will the spectral lines appear?
Blue
Red
Green
Who proposed the wave theory of light?
Huygens
Newton
Maxwell
Which of the following colors has the maximum deviation in a prism?
Blue
Yellow
Green
A glass slab is placed over colored letters. Which letters appear the least raised?
Red
Blue
Violet
According to the modern theory of the nature of light, what does light exhibit?
Both wave and particle nature
Wave nature only
Neither particle nor wave nature
When the light is incident at a polarizing angle, which of the following is completely polarized?
Reflected light
Refracted light
Both reflected and refracted light
At what speed does a signal from a remote control to a toy car travel?
Speed of Light
Speed of Sound
Supersonic Speed
Who discovered the electron, which resulted in the development of electronics?
Sir J. J. Thomson
Michael Faraday
Rutherford
What does a simple microscope show?
Upright virtual images
Inverted virtual images
Inverted real magnified images
If a mirror produces a magnified erect image of an object, what type of mirror is it?
Concave
Convex
Plane
What causes colors to appear on a thin soap film and on soap bubbles?
Interference
Refraction
Diffraction
What type of light does a polarizer device convert a beam to?
Electromagnetic waves
Liquid crystal display
Intensity of light
What is the penetration of light into a geometrical shadow region called?
Diffraction
Polarization
Interference
When white light passes through a glass prism it is split into several colors. What is this due to?
Refraction
Reflection
Diffraction
What is the unit of frequency?
Hz
m/s
s
What causes a rainbow?
Dispersion
Refraction
Scattering
How is the image formed in an astronomical telescope?
Inverted and virtual
Erect and virtual
Real and erect
Which of the following is used to obtain virtual and diminished images?
Convex mirror
Concave lens
Convex lens
The nature of the Sun's spectrum is:
A continuous spectrum with absorption lines
A line spectrum
A band spectrum
Which is the correct equation?
Wave speed = Frequency x wavelength
Wave speed = Frequency + wavelength
Wave speed = Frequency / wavelength
What does the resolving power of a telescope depend upon?
The diameter of the objective lens
The focal length of eyepiece lens
The focal length of the objective lens
Who was the first to show that light is an electromagnetic wave?
Maxwell
Marconi
Hertz
What is a signal that varies continuously in frequency called?
An analogue signal
An AM signal
A digital signal
Which signal maintains the best quality?
Digital
Analogue
Infrared
What type of waves are light waves examples of?
Transverse
Longitudinal
Transverse only when reflected
When a glass convex lens is emerged in water, what happens to its focal length?
It decreases
It increases
It remains the same
What causes chromatic aberration in lenses?
The phenomenon of dispersion
The phenomenon of absorption
The phenomenon of scattering
What is a property of transverse light waves?
Polarization
Rectilinear propagation
Interference
When is the diffractive index of light greater?
When the wavelength is shorter
When the frequency is greater
When the wavelength is greater
Which of the following wavelengths will experience greater deviation while passing through a prism?
Violet
Green
Orange
Why do diamonds shine so brightly?
Because of the total internal reflection of light
Because of the reflection of the environment
Because of the refraction of light
When a ray is refracted, which one of the following does not change?
Wavelength
Frequency
Amplitude
In a diffraction grating experiment, how can the pattern be enhanced?
Increasing the wavelength
Decreasing the wavelength
By a constant wavelength
How do signals travel through optical fibers?
As infrared
As microwaves
As radio waves
Why does the dispersion of light occur?
Because of a change in wavelength
Because of the angle of incidence
Because of the angle of the prism
A ray of light passes from a rarer to a denser medium. What physical quantity remains unchanged?
Frequency
Velocity
Wavelength
Which material is used to see the infrared spectrum of light through a prism?
A single crystal of rock-salt
A flint crystal
A gold crown
What does light intensity depend on?
Frequency
Time period
Amplitude
What is the lowest frequency in the range of human hearing?
20Hz
200Hz
20kHz
What color will red glass appear to be in a dark room if heated?
Green
Purple
Black
How long does the Earth take to complete one orbit of the Sun?
365.25 days
366 days
365.98 days
What are the properties of optical fiber based on?
Total internal reflection
Less scattering
Less absorption coefficient
What is the inverse square law of intensity valid for?
A point source
A line source
A spherical source
What causes a mirage to be observed in the desert?
Total internal reflection
Refraction
Reflection
When light transmits from one medium to another, which of the following quantities remains unchanged?
Frequency
Wavelength
Velocity
What is the solar spectrum during a complete solar eclipse?
Dark band
Dark line
Absorption
What is Lumen a unit of?
Luminous flux
Luminosity
Quantity of light
What does the coherence of two light sources imply about the light waves emitted by each?
Constant phase difference
The same frequency
The same intensity
Which of the following has the lower wavelength?
Cosmic rays
X-ray
Gamma ray
Color vision is the capacity of an organism or machine to distinguish objects based on ____?
Wavelength
Temperature
Wobble factor
What device is used to measure atmospheric pressure?
Barometer
Hygrometer
Pyrometer
Swimming is possible by which law of motion?
Third law of motion
Second law of motion
First law of motion
Which physical quantities have the same dimension?
Moment of couple and work
Force and power
Work and power
A running boy jumps onto a rotating platform. Which of the following is conserved?
Angular momentum
Linear momentum
Kinetic energy
When two surfaces are coated with a lubricant, what is reduced?
Friction
Viscosity
Surface Tension
Which of the following is a scalar quantity?
Work
Electric field
Displacement
What does the gravitational mass of a body not depend on?
Volume
Gravitational constant G
Mass
Who was color television invented by?
John Logie Baird
Maxwell
Newton
What causes rain drops to be a spherical shape?
Surface tension
Viscosity
Residual pressure
Who was the inventor of the microphone?
Alexander Graham Bell
Pieter Zeeman
Burton Richter
Which of the following pairs of physical quantities may be represented in the same unit?
Heat and work
Heat and temperature
Temperature and work
Which of the following planets is considered a twin sister of Earth?
Venus
Mars
Jupiter
Bernoulli's theorem is based on the principle of conservation of what quantity?
Energy
Momentum
Mass
Which of the following is not a unit of energy?
Watt
Joule
Calorie
What does the kinetic energy of molecular motion appear as?
Temperature
Heat
Potential energy
Kinetic theory of gases states that at a given temperature the molecules of all the gases have the same mean _____?
Kinetic energy
Speed
Velocity
What happens to a gas that is compressed at constant temperature?
Its pressure increases
Its average kinetic energy increases
Its mass decreases
In which case is the angular momentum of a body conserved?
The torque acting on it is zero
The force acting on it is constant
The force acting on it is zero
Which of the following laws can be the basis of separating a mixture of gases?
Graham's law of diffusion
Boyle's law
Newton's law
What does a hotter gas imply a higher average value of?
Kinetic energy
Total energy
Heat content
Who is known for the three laws of motion?
Isaac Newton
Albert Einstein
H. W. Seeley
The theorem of equipartition of energy applies to the system whose constituents are:
In random motion
In constant motion
At rest
Who proposed the theorem of equipartition of energy?
Maxwell
Einstein
Faraday
What is the required characteristic of equilibrium?
Acceleration equals zero
Momentum is zero
Kinetic energy equals zero
When a mass is revolving in a circle on a plane, what is the direction of angular acceleration?
Upward
Along the radius
Tangential
Who invented dynamite?
Alfred Nobel
Huygens
H. W. Seeley
What remains constant when the Earth revolves around the Sun?
Angular momentum
Linear momentum
Angular kinetic energy
By whom was the experimental value of G first accurately determined?
Henry Cavendish
Isaac Newton
Albert Einstein
Which scientist was awarded the Nobel Prize for both Physics and Chemistry?
Madam Marie Curie
Isaac Newton
Albert Einstein
If the kinetic energy of a light weight object and a heavy object is the same, which object has the higher momentum?
Heavy object
Light weight object
Both have the same momentum
The dimensional formula for stress is same as that for:
Pressure
Force
Work
The dimensional formula for the modulus of elasticity is same as that for:
Stress
Strain
Velocity
Which modulus of elasticity is involved in compressing a rod to decrease its length?
Young's modulus
Bulk modulus
Modulus of rigidity
What is the bulk modulus of a perfectly rigid body?
Infinity
Zero
One
What is the modulus of rigidity of a liquid?
Zero
One
Infinity
What is the Young's modulus of a perfectly rigid body?
Infinity
Zero
One
With the increase of temperature, what happens to the Young's modulus?
It decreases
It increases
It remains constant
What is the Young's modulus of air?
Zero
Infinity
One
What is the breaking load per unit area of cross section of a wire called?
Breaking stress
Yield point
Ductility
If both the length and radius of a wire are doubled, what happens to its modulus of elasticity?
It remains unchanged
It is doubled
It is reduced to one fourth
What is the ratio of the lateral strain and longitudinal strain of a wire called?
Modulus of rigidity
Compressibility
Tensile strength
What is angular momentum?
A vector (axial)
A vector (polar)
A scalar
Which constant is associated with a body moving in circular motion with constant speed?
Constant kinetic energy
Constant velocity
Constant displacement
What is applied to produce rotary motion in a body?
Couple
Force
Impulse of a force
Which of the following is constant for a satellite in orbit?
Potential energy
Velocity
Acceleration
Which of the following quantities is expressed as force per unit area?
Pressure
Work
Volume
An ice cube is floating in a beaker of water. If the ice cube melts what happens to the level of water in the beaker?
It remains unchanged
It decreases
It increases
Which of the following was invented by James Watt?
Steam engine
Airplane
Transistor
A wooden block is floating in a trough of water. If the trough falls freely. What happens to the upward thrust on the wooden block?
It remains unchanged
It increases
It decreases
For a floating body to be in stable equilibrium where should its centre of buoyancy be located?
Above the centre of gravity
Below the centre of gravity
It may be anywhere
Who invented the nuclear reactor?
Enrico Fermi and Leo Szilard
Peter Spencer
Niels Bohr
Why is a dam holding a water reservoir thicker at the bottom?
The pressure of water increases with depth
The quantity of water increases with depth
The density of water increases with depth
What does a sudden fall of air pressure in a brief period of time indicate?
A storm
Rain
A cold front
What law do hydraulic brakes work on the basis of?
Pascal's law
Gravitational law
Archimedes principle
Which of the following works on the principle of Pascal's law?
Hydraulic lift
Sprayer
Thermometer
What is one of the major factors that determines the streamlined or turbulent nature of the flow of liquid?
Velocity of flow
Surface tension
Length of the path
Who invented the electric bulb?
Thomas Edison
Alessandro Volta
Guglielmo Marconi
Who won a Nobel Prize for his work on the structure of the atom and radioactivity?
Ernest Rutherford
S. N. Bose
Robert Boyle
What does pressure exerted by a liquid depend on?
Density
Viscosity
Critical velocity
Who was the hydrogen bomb developed by?
Dr. Edward Teller
Zacharias Janssen
Elmer Sperry
What does the viscous drag on a liquid layer depend on?
Velocity
Gravity
Density
What exhibits viscosity?
Fluids
Solid and liquid
Only solids
If a liquid is stirred, it ultimately comes to rest due to what?
Viscosity
Inertia
Surface tension
What is the critical velocity for a non viscous liquid?
Zero
One
Infinity
Viscosity is a transport phenomena explained by using the concept of transfer of what?
Momentum
Mass
Potential energy
To what is Stokes theorem applied to?
Viscous liquid
Non viscous liquid
Solution
What makes a cloud float in air?
Low density
High density
High viscosity
Why do rain drops fall with a constant velocity?
Viscosity
Density
Gravity
What does mobility of a liquid decrease with?
An increase in viscosity
A decrease in viscosity
A decrease in surface tension
Who won the Nobel Prize in Physics in 1923 for work on the "Photoelectric Effect"?
Robert Andrews Millikan
Eugene Paul Wigner
Robert Hofstadter
Which of the following is used in the design of atomizers?
Bernoulli's theorem
Pascal's law of liquid
Archimedes principal
What causes the free surface of a liquid to have a minimum area?
Surface tension
Pressure
Viscosity
A gale blows over a house. The force due to the gale on the roof is in which direction?
Upward
Downward
Stable
Liquid flows through a horizontal tube of variable diameter. The pressure is lowest in which case?
Where the velocity is highest
Where the velocity is lowest
Where the diameter is largest
What is the essential characteristic for a good lubricant?
High viscosity
High density
High surface tension
Surface tension does not depend upon what?
Atmospheric pressure
Temperature
Nature of the liquid
What makes liquid drops spherical?
Surface Tension
Adhesion
Gravity
What flattens large sized liquid drops?
Gravity
Cohesion
Adhesion
Which factor does not affect the angle of contact for a rain drop?
Surface area
Gravitation
Viscosity
How does plugging help to retain sub soil water?
By breaking capillaries
By creating capillaries
By turning the soil upside down
Which of the following characteristics of matter causes molecular force?
Electric
Magnetic
Gravitational
How do intermolecular forces vary?
Inversely as a higher power of distance
Directly as the square of distance
Inversely as the square of distance
In which of the following shapes will the metallic mould of a given mass have the minimum surface area?
Sphere
Cylinder
Ellipsoid
What causes surface tension?
Cohesion
Viscosity
Elasticity
Which of the following properties help in soldering?
Surface tension
Viscosity
Friction
What enables us to write on a black board with chalk?
Adhesion
Gravity
Cohesion
Liquid in a tube displays a meniscus due to surface tension. What shape is the meniscus?
Concave
Convex
Plane
If a liquid does not wet the material of a capillary tube, the liquid in it does what?
Falls
Rises
Neither rises nor falls
The free surface of a liquid tends to the minimum possible area. This happens due to what?
Surface tension
Gravity
Fluidity
A parallel connection is essential in a car, why?
So everything can be turned off independently
To prevent a massive build-up of static
To stop the car exploding
What makes the bristles of a shaving brush cling together when taken out of water?
Surface tension
Gravity
Fluidity
When the temperature increases, what happens to the surface tension of a liquid?
It decreases
It increases
It remains unchanged
Which theory describes the relationship between the forces acting on a body and its motion?
Newton's laws of motion
Relativity theory
Universal gravitation
How does the angle of contact change with the increase in temperature?
It decreases
It increases
It remains unchanged
What is the surface tension of boiling water?
Zero
Infinity
Less then zero
Which of the following groups have quantities that do not have the same dimension?
Force and impulse
Velocity and speed
Work and energy
The centripetal force for a car moving on a road is created by what?
Friction due to tires
Force of brakes
The driver of the car
Identify the pair of quantities whose dimensions are equal.
Torque and work
Stress and energy
Force and stress
What is Saturn's largest satellite?
Titan
Atlus
Tethis
When a body is moving on a surface, what is the force of friction called?
Dynamic friction
Static frication
Limiting friction
What is a fluid's resistance to a flow known as?
Viscosity
Friction
Surface Tension
What is the nature of the path of an electron which moves in a transverse electric field?
Parabola
Circle
Ellipse
What do we determine with a mass spectrograph?
Specific charge
Wavelength
Charge
Who invented and improved the cyclotron atom-smasher?
E. Lawrence
Lorentz
Maxwell
What do you need to increase to produce hard X-rays in a Coolidge tube?
Potential difference across cathode and anticathode
Current in filament
Potential difference across the filament
What happens when fast moving electrons are stopped by a metallic target in an evacuated chamber?
X-rays are produced
Gamma rays are produced
Beta rays are produced
In which of the following emissions does the electronic structure have no effect?
Gamma rays
Beta rays
X-rays
In 1921 the Nobel Prize in Physics was awarded for what?
The photoelectric effect
Modern quantum theory
Theory of radioactivity
The energy of X-rays varies inversely to what?
The wavelength
The velocity
The frequency
What causes the emission of X-rays?
The jumping of an electron from a higher orbit to a lower orbit
Reflection of electrons
Scattering of electrons
An increase in which of the following increases the power of X-rays?
Frequency
Wavelength
Velocity
What is the maximum frequency of X-rays determined by?
Potential difference across cathode and anti cathode
Filament current
Filament potential
The shortest wavelength of X-rays emitted from an x-ray tube depends upon what?
Voltage applied to tube
Current in tube
Nature of gas in tube
What does Niels Bohr's theory concern?
Structure of an atom
Radioactivity
Thermodynamics
When X-rays pass through air what do they do?
Ionize the gas atoms
Produce fumes in the air
Accelerate gas atoms
The absorption coefficient of X-rays for a given wavelength is higher from which metal?
Lead
Copper
Aluminum
What do X-rays not show the phenomenon of?
Deflection by electric field
Diffraction
Polarization
Why do we not use X-rays in radar?
They are not reflected by the target
Their speed is low
They can damage the target
What controls the penetrating power of the X-rays in a cooling tube?
Potential difference across the tube
Pressure of the age
Filament current
What determines the shortest wavelength emitted from the X-rays tube?
Voltage applied across the tube
Nature of the gas in the tube
Atomic number of the target
Where does the X-ray region lie between?
Gamma rays and ultraviolet region
Visible and short radio waves
Ultraviolet and visible region
Why does the Hydrogen atom not emit X-rays?
Its energy levels are too close to each other
It is too small in size
It has a single electron
What do we use to study the internal atomic structure of crystals?
X-rays
Infrared rays
Visible light
Who invented radio telegraphy and succeeded in sending wireless messages across the Atlantic Ocean?
G. Marconi
Sir J. J. Thomson
Johannes Kepler
What are radiotherapy X-rays used for?
To treat cancer
To detect bone fracture
To detect heart disease
In obtaining x-ray photographs of a hand we use the principle of what?
Shadow photography
Photoelectric effect
Image formation by optical system
The x-ray detection of fracture in bones is based on what?
Shadow photography
Ionization
Photoelectric emission
In a parallel circuit, what is the total current going into a junction when compared to the total current leaving that same junction?
It is equal
It is half
It is double
What determines the penetrating power of X-rays?
Frequency
Velocity
Intensity
What does the magnitude of saturation for a photoelectric current depend upon?
Intensity of radiation
Work function
Stopping potential
Increase in frequency of the incident of radiation increases the what?
Kinetic energy of photoelectrons
Work function
Threshold frequency
What does the threshold wavelength depend upon?
Work function
Velocity of electrons
Frequency of radiation
The photoelectric effect can be explained by assuming what about light?
It consists of quanta
It can be polarized
It is a form of transverse wave
Which of the following is an incorrect statement about a photon?
Photons exert no pressure
A photon's rest mass is zero
A photon's momentum is hv/c
When a photon collides with an electron which of the following characteristics of the photon increases?
Wavelength
Energy
Frequency
Which of the following is not a property of photons?
Rest mass
Energy
Momentum
The study of the photoelectric effect is useful in understanding what?
Quantization of energy
Quantization of charge
Conservation of charge
Which of the following makes use of the photoelectric effect?
Television camera
Telephone
Radar
The maximum energy of the electrons released in photocell is independent of what?
Intensity of incident light
Nature of cathode surface
Frequency of incident light
Which of the following does not change when a photon enters glass from air?
Energy
Momentum
Velocity
Which of the following achieves conversion of electro magnetic wave energy into electrical energy?
Photocell
Thermo couple
Cathode ray tube
Which of the following can not be found at rest?
Photon
Electron
Proton
Who discovered the two kinds of electric charge "positive" and "negative"?
Benjamin Franklin
Wilbur Wright
Murray Gell-Mann
What are types of laser?
Solid, liquid and gas
Solid only
Liquid only
Who won the first Nobel Prize in physics for his discovery of x-ray?
Wilhelm Conrad Roentgen
Michael Faraday
Rutherford
Who was the honored Person of the Century by Time magazine in 1999?
Albert Einstein
Madam Marie Curie
Isaac Newton
The wavelength of matter waves is independent of what?
Charge
Mass
Momentum
Who proved that photons possess momentum?
Compton
Planck
Bohr
What do matter waves or de Broglie waves exhibit?
Diffraction
Transverse waves
Electromagnetic waves
Who proposed the hypothesis regarding the dual nature of material particles?
De Broglie
Davison
Heisenberg
Wave particle duality of matter suggests that it is not possible to measure the time interval with certainty simultaneously with what?
Energy
Location
Mass
Moving with the same velocity, which of the following has the largest wavelength of matter waves?
Beta particles
Proton
Neutron
Which of the following will have shortest wavelength while moving with the same speed?
Deuteron
Electron
Proton
What does the 'L' in LASER stand for?
Light
Lunar
Lunch
Who proposed the nuclear model of an atom?
E. Rutherford
J.J. Thomson
Niebuhr
According to classical theory, the Rutherford model of an atom is what?
Unstable
Stable
Semi-stable
According to classical theory, the proposed circular path of an electron in a Rutherford atom will be:
Spiral
Circular
Parabolic
What is the rate of change of displacement called?
Velocity
Speed
Acceleration
What is the acceleration due to gravity on the Earth's surface?
9.8 m/s^2
98 m/s^2
980 m/s^2
The phenomenon of spontaneous disintegration of a heavy nucleus is called what?
Radioactivity
Fission
Fusion
What is the name of the special device that is made from semiconductor material?
Diode
Light dependent resistor
Thermistor
In which region of the electromagnetic spectrum does the Lyman series of hydrogen atoms lie?
Ultraviolet
Visible
Infrared
Who explained the origin of the Fraunhofer lines?
Kirchhoff
Snell
Fresnel
Why are Alpha particles used in some smoke detectors?
Because alpha particles have high ionizing ability
Because alpha particles have high kinetic energy
Because alpha particles have low chemical energy
The band spectrum is obtained whenever the incandescent vapor of the excited substance are in what state?
Molecular state
Plasma state
Atomic state
Spectroscopy can be used to identify what?
Matter of unknown composition
Silver in bedrocks
It doesn't matter
Which of the following sources give discrete emission spectrum?
Mercury vapor lamp
Candle
Sun
Who proposed that the orbits of electrons in an atom were elliptical?
Summerfield
Bohr
Thomson
How does the energy difference between the consecutive energy levels vary as the quantum number (n) increases?
It decreases
It increases
Remains unchanged
Who achieved the first nuclear transmutation or artificial disintegration of atomic nucleus?
Rutherford
Chadwick
Heisenberg
Who is credited with the discovery of the proton?
Rutherford
Thomson
Millikan
What does the helium atom not contain?
Six nucleons
Two protons
Two electrons
Who discovered the neutron?
Chadwick
Rutherford
Millikan
Which of the following is not the property of the atomic nucleus?
Sharp boundary
Definite charge
In definite charge
The volume of the nucleus is proportional to its what?
Mass number
Number of protons
Atomic number
Elements are presented in the periodic table by increasing values of their atomic numbers and what?
The number of protons in their atomic nuclei
The number of isobars in their atomic nuclei
The number of electrons in their atomic nuclei
Mossbauer spectroscopy probes tiny changes in the energy levels in what?
An atomic nucleus
A mass number
An isotope value
Which of the following cannot be used to separate isotopes?
Chemical reaction
Centrifuge
Thermal diffusion
In the brain bridge mass spectrograph, which of the following is used for the separation of isotopes?
Both electric and magnetic fields
Electric field
Magnetic field
Which of the following helps in our understanding of the stability of a nucleus?
Binding energy per nucleon
Binding energy
Both
What is the binding energy of a hydrogen nucleus?
Zero
Infinite
Less then zero
In 1914, Niels Bohr obtained the spectral frequencies of which atom?
Hydrogen atom
Carbon atom
Oxygen atom
Which of the following is not conserved in nuclear decay?
Number of fundamental particles
Mass number
Atomic number
Which of the following is not conserved in a nuclear reaction?
Mass
Charge
Momentum
Which of the following particles cannot be used for the disintegration of a nucleus?
Electron
Neutron
Proton
Which of the following is also called the 'blue planet' or 'green planet'?
Earth
Mars
Venus
In a nuclear reactor, what are the cadmium rods used for?
Absorb the neutrons
Slow down the neutrons
Generate neutrons
When was the first fusion bomb tested?
1945
1949
1962
Who discovered nuclear fission?
Otto Hahn and Fritz Strassman
Niels Bohr
Ernest Rutherford
What does a fusion bomb involve?
Synthesis of lighter nuclei into heavier ones
Explosion of TNT
Burning of huge amount of coal
In a nuclear reactor what is used to slow down the neutrons?
Moderator
Coolant
Control rods
What is the critical mass of uranium?
Minimum mass needed for chain reaction
1kg equivalent
75 kg
What is the function of the moderator in a nuclear reactor?
Slows down neutrons
Absorbs thermal energy
Absorbs neutrons
Where do cosmic rays originate?
Outside the solar system
From the Earth's core
From the Sun
What is the power output of a reactor adjusted by?
Controlling how many neutrons are able to create more fissions
Counting the decay of neutron emission
By a power output switch
The mass number of a nucleus is what?
Sometimes more than and sometimes equal to its atomic number
Always less than its atomic number
Always more than its atomic number
What are alpha particles?
Helium nuclei
Fast moving electrons
Electromagnetic rays
What are y-rays?
Electromagnetic waves
Helium nuclei
Fast moving electrons
Which of the following are deflected by an electric field?
Alpha particles
Gamma rays
X-rays
What are beta rays?
Charged particles emitted by the nucleus
Neutral particles
Electromagnetic radiation
What determines the half life of radioactive elements?
The emissions of ionizing particles
Mass number
Atomic number
What determines the half life of a radioactive sample?
Temperature and pressure
Temperature only
Pressure only
What is the half life of lead?
Infinite
Zero
1590 days
Which of the following is not the property of a covalent crystal?
High melting point
Good conductor
High latent heat of fusion
Which of the following is an example of a covalent crystal?
Diamond
Paraffin
Sodium chloride
A covalent crystal is what?
Chemically bound
Very hard
Brittle
What is a covalent bond a form of?
Chemical bonding
Ionic bonding
Covalent bonding
In covalent bonding, which type of bond leads to variable melting points?
Metallic
Ionic
Covalent
Which of the following is not a property of ionic crystals?
Good conductors
High melting point
High latent heat of fusion
Which of the following is an example of ionic crystals?
Barium Sulphate
Silicon
Copper
Ionic crystals can be very what?
Brittle
Hard
Soft
What is a solid that is transparent to light but possesses low melting point formed by?
Van der Waal bonds
Ionic bonds
Covalent bonds
Which of the following is not characteristic of ionic compounds?
Low boiling point
High melting point
Crystalline in solid form
Which of the following is not the property of metallic substances?
Non crystalline
Good conductor
Opaque to light
Which of the following is not the property of Van der Waal compounds?
High melting point
Soluble in water
Low electric conductivity
Which of the following rays are produced when very high energy electrons are stopped suddenly at a metal target?
X-rays
Gamma rays
Beta rays
What does the nucleus of an atom contain?
Protons and neutrons
Protons and electrons
Only neutrons
In the nucleus of uranium-235 there are what?
A total of 235 protons and neutrons
235 protons
235 neutrons
The ratio of the velocity of an electron in the first orbit to the second orbit is what?
2
4
6
The Galilean moons are the four moons of which planet?
Jupiter
Galileo Galilei
Venus
Which of the following waves/rays are produced during radioactive nuclear change?
Gamma rays
X-rays
Beta rays
What are Gamma rays used for?
Sterilizing foodstuff
Tanning
Hair growth
What are radioisotopes?
Isotopes that are radioactive
Some nuclei which emit radio waves
Isotopes used in radio sets
Radiocarbon dating techniques are used to estimate the age of what?
Fossils
Rocks
Soil
By what can the age of the Earth be estimated?
Uranium dating
Atomic clocks
Carbon dating
The process of the splitting up of a heavy nucleus into roughly two equal fragments with the emission of energy is called what?
Fission
Fusion
Transmutation
The process of fission occurs mainly in what?
A nuclear reactor
The Sun
A hydrogen bomb
In what does fission reaction take place?
A reactor as well as an atomic bomb
An atomic bomb only
A nuclear reactor only
Enriched uranium means uranium that has been enriched in what isotope?
Uranium-235
Uranium-236
Uranium -238
The process by which energy is generated in the Sun is the fusion of what?
Hydrogen
Helium
Uranium
The mass of the Sun is how many times greater than the Earth?
333,000
129,000
490,000
What is a GM counter used for detecting?
Radioactivity
Coal
Underground water
Who proposed the general theory of relativity?
Albert Einstein
Isaac Newton
Franz Wegner
The hydrogen bomb is based on the principal of what?
Uncontrolled fusion reaction
Controlled fission reaction
Uncontrolled fission reaction
In uranium-235 when does fission occur?
When neutrons are absorbed
When neutrons are emitted
When electrons are emitted
Which of the following is a particle and anti-particle pair?
Electron and positron
Proton and neutron
Electron and proton
Cobalt-60 is commonly used in radiation therapy because it emits what?
Gamma rays
Beta rays
X-rays
In nuclear fission, the nucleus of an atom does what?
Splits into smaller parts
Combines with other nucleus
Melts to produce energy
How many stars are there in our Solar System?
1
4
2
What is the number of planets in our Solar system?
8
7
9
Which of the following stars is nearest to the Sun?
Alpha Centauri
Sirius
Procyon
How many stars approximately can you see on a clear night with the naked eye?
2000
20000
23000
What is the approximate ratio of the diameter of the Sun to that of the Earth?
110
1100
111
Which of the following helps in determining the temperature of the Sun?
Stefan's law
Kirchhoff's law
Maxwell Boltzmann law
Which of the following helps determine the temperature of stars?
Weins displacement law
Rayleigh jeans law
Maxwell Boltzmann law
The same force is applied to three balls of different weight. Which one will experience the greatest acceleration?
The 1kg ball
The 4kg ball
The 2kg ball
What is a group of bright and faint stars called?
Galaxy
Constellation
Comet
What is the planet nearest to the Earth?
Mars
Venus
Mercury
What is the brightest planet in our Solar system?
Venus
Mercury
Mars
Which of the following is called the red planet?
Mars
Venus
Mercury
Who proposed the continuous creation theory of the origin of the universe?
Hoyle
Hubble
Russell
Which of the following is not a part of our Solar system?
Quasars
Meteors
Comets
On what law is the Hubble law based?
Doppler law
Law of gravitation
Stefan's law
What magnitude was assigned by Hipparchus to the faintest star?
8
1
4
What force keeps the planets in orbit?
Gravity
Magnetism
Friction
What did Kepler discover about the way planets travel in orbits?
The orbits are elliptical
The orbits are hyperbolic
The orbits are parabolic
As a space ship moves from a higher to a lower orbit, what happens to its speed?
Increases
Remains unchanged
Decreases
Which planet is the most similar to Earth in mass, size, and density?
Venus
Mars
Uranus
Which is the only planet on which the Sun rises in the west?
Venus
Uranus
Pluto
Which planet appears to be the brightest in the night sky?
Venus
Jupiter
Saturn
A star with a mass of less than 1.4 solar masses will probably end its life as a what?
White dwarf
Neutron star
Black hole
Rocks of which planet are likely to float on water?
Saturn
Mars
Jupiter
Among the moons of the planets in our solar system which is the largest?
Ganymede of Jupiter
Titan of Saturn
Callisto of Jupiter
Which of the following do not belong to the solar system?
Nebulae
Asteroids
Planets
Which planet has prominent rings around it?
Saturn
Uranus
Mars
What is the nearest planet to Earth?
Venus
Mars
Mercury
Which is the heaviest among the inner planets?
Earth
Mercury
Venus
Which is the planet farthest from the Sun?
Neptune
Jupiter
Saturn
Which planets do not have satellites revolving around them?
Mercury and Venus
Mars and Venus
Mars and Mercury
Which planet has the maximum number of satellites?
Jupiter
Uranus
Mars
The tail of a comet always points away from the Sun due to what?
Solar radiation and solar wind
Force of repulsion
Centrifugal force
Which comet was seen in 1910 and again in 1986?
Halley's comet
Holmests comets
Great comet
The Sun is what?
A medium sized star
A small star
A big star
Why do stars appear to move from east to west?
Earth is rotating from west to east
Whole universe is moving from east to west
Earth is rotating from east to west
The pole star is a part of which constellation?
Ursa minor
Ursa major
Orion
How many known moons has the planet Neptune?
13
4
2
What is heavenly matter landing on the Earth's surface known as?
Meteorite
Meteor
Shooting star
Which of the following has an equal period for rotation and revolution?
The Moon
Mercury
Venus
What are artificial satellites used for?
Detecting minerals and space research
Only detecting minerals
Only space research
What is the unit of astronomical distance?
Light year
Kilometer
Nautical mile
Our solar system belongs to the galaxy called what?
Milky way
Andromeda nebula
Radio galaxy
Which star is nearest to the Earth (other than the Sun)?
Alpha Centauri
Proxima Centauri
Pole star
Light from the nearest star (other than the Sun) reaches the Earth in how many years?
4.2 years
4.2 seconds
44 years
How many natural satellites does Earth have?
1
2
5
Who is often regarded as the father of modern physics?
Albert Einstein
Isaac Newton
Wilbur Wright
The Milky Way is the name of what?
A galaxy
A star asteroid
A planet
Stars twinkle because of what?
Refraction
Reflection
Scattering
A physical quantity having magnitude and no direction is known as what?
Scalar
Vector
Neither scalar nor vector
A physical quantity having both magnitude and direction is known as what?
Vector
Scalar
Neither vector nor scalar
Which one of the following is a scalar quantity?
Speed
Displacement
Velocity
Which one of the following is NOT a vector quantity?
Volume
Force
Acceleration
Momentum is a what?
Vector quantity
Scalar quantity
Neither vector nor scalar
What happens in a nuclear power station?
Uranium reacts with hot water to make hydrogen fuel
Nuclear fuel heat is used to boil water
Radiation is used to power a generator
Which pair has the same formula?
Momentum and impulse
Force and pressure
Speed and velocity
Which one of the following is a vector quantity?
Impulse
Time
Length
Which of the following statements about geostationary orbits is correct?
They are high above the equator
An orbit takes 12 hours
Orbits are at 270 degrees to the equator
Which of the following can be zero when the particle is in motion for some time?
Displacement
Speed
Distance covered
Ultraviolet light can be used for what?
To cook food
For mobile phone communications
For fluorescent lights
A particle in uniform motion can possess what?
Radial acceleration
Tangential acceleration
Both radial and tangential acceleration
A ball is projected upwards. Its acceleration at the highest point is which of the following?
Directed downwards
Directed upwards
Zero
Which of the following is NOT a projectile?
A rocket fired into space
A bullet fired from the gun
A ball thrown upwards
The distance traveled by a body dropped from the top of a tower is proportional to the __ __ __ __.
Square of time elapsed
Mass of the body
Weight of the body
What determines the nature of the path followed by a particle?
Velocity
Speed
Acceleration
The outer rail of the curved railway track is raised above the inner one. Why?
To compensate for centripetal force
To balance the gravity
To overcome the frictional force
In the case of a projectile, where is the angular momentum at its minimum?
At the starting point
At the highest point
On return to ground
In the long jump when does the athlete experience maximum force?
On taking off
On landing
At the maximum height
Which object is the densest?
Neutron star
Supernova
Black hole
A particle is moving at a constant speed along a straight path. In which of the following is a force not required?
To Keep it moving with uniform velocity
Increase it speed
Decrease the momentum
Passengers standing in a bus are thrown outward when the bus takes a sudden turn. Why does this happen?
Inertia
Change of momentum
Change in acceleration
Which is the main scientific theory for the origin of the universe?
The Big Bang
The Oscillating Universe
The Steady State
A rocket works on the principle of conservation of what?
Momentum
Mass
Energy
A body is at the rest on the surface of the Earth. Which of the following statements is correct?
Net downwards force is equal to the net upwards force
No force is acting on the body
Only the weight of the body acts on it
Which of the following statements about centripetal and centrifugal forces is correct?
Centripetal force is directly opposite to centrifugal force
Both are the same
Both forces act on the same body
A particle moving along a circular path due to a centripetal force having constant magnitude is an example of motion with what?
Constant speed and variable velocity
Constant speed and constant velocity
Variable speed and variable velocity
A body moving in a circular path with constant speed has what?
Variable acceleration
Constant retardation
Constant acceleration
For a particle moving along a circular path with constant speed, the acceleration is constant in what?
Magnitude
Direction
Both magnitude and direction
What happens to the coefficient of friction, when the normal reaction is halved?
No change
Doubled
Halved
The maximum force of friction is called what?
Limiting friction
Static friction
Dynamic friction
Which of the following is a self adjusting force?
Static friction
Limiting friction
Dynamic friction
Lubrication reduces friction because of what?
The relative motion between solid and liquid
The law of limiting friction is not applicable
Lubricant molecules act as ball bearings
When an axle rotates in a sleeve, the friction involved in the process is what?
Sliding
Rolling
Limiting
The decrease of which one of the following quantities enables us to transport a heavy barrel by rolling across the road?
Coefficient of friction
Limiting friction
Normal reaction
What is the branch of physics in which the celestial bodies are studied?
Astrophysics
Astronautics
Astrology
Why we use circular tires?
Rolling friction is smaller than sliding friction
They require less material
It is easy to inflate the circular tires
How does the recommended inflation of tires save fuel?
Friction with the road decreases
Normal reaction decreases
Normal reaction increases
The breaking load of a rope is half the weight of the climber. In which of the following cases is the rope not likely to break?
Climber climbs down fast
Climber climbs up slowly
Climber climbs up fast
A man drops an apple in a lift. He finds that the apple remains stationary and does not fall. The lift is doing what?
Descending with constant acceleration
Ascending with constant speed
It is stationary
A passenger in the bus finds that his suitcase is sliding backwards. This means that the bus is doing what?
Accelerating
Turing right
Turing left
Friction may be classified as what?
Electrical interaction
Gravitational interaction
Magnetic interaction
Which of the following is an advantage of solar panels?
They make hot water using the Sun's energy
They need electricity to get the water really hot
They do not work at night
A bullet is embedded in a solid block laying on a frictionless surface. What is conserved?
Momentum
Kinetic energy
Both momentum and kinetic energy
Which one of the following pairs contains one vector and one scalar quantity?
Speed and force
Weight and momentum
Power and time
A wooden block is floating in water in a beaker. If the beaker were to free fall, the upthrust on the block will be what?
Zero
Equal to the weight of the block
Slightly less than the weight of the water
What is the path of a projectile called?
Trajectory
Projectile path
Projected particle path
When a body rotates in a circular path about a line, the line can be described as what?
Axis of rotation
Axis of motion
Plan of rotation
Who provided the first exact solution to the equations of general relativity?
Karl Schwarzschild
John Michell
Copernicus
Weightlessness in an orbiting spacecraft is physically identical to what?
Free fall
Velocity vector
Force of gravity
What is force a product of?
Mass and acceleration
Mass and velocity
Mass and momentum
The law of inertia is related to:
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Momentum is the product of what?
Mass and velocity
Mass and acceleration
Mass and force
A gun is fired and it recoils back with a force. This event is best explained using which of Newton's laws?
Third
Second
First
Rocket motion works on the basis of which of Newton's laws?
Second and third
Second
First
The law of the conservation of linear momentum is the outcome of which of Newton's laws?
Second and third
First and second
First and third
What is the Parsec a unit of?
Length
Mass
Velocity
The distance traveled by light in vacuum in one year is called what?
Light year
Parsec
Astronomical units
What is the displacement of body per unit time called?
Velocity
Acceleration
Force
The least distance between the initial and final position of the body moving a long a straight line in a definite direction is called what?
Displacement
Acceleration
Motion
Displacement may be which of the following?
Positive, negative, zero
Only positive
Only zero
The rate of change of velocity of the body is called what?
Acceleration
Average velocity
Average speed
The total distance traveled by a body over total time elapsed is called what?
Average speed
Average velocity
Displacement
The total displacement of a body over total time elapsed is called what?
Average velocity
Average speed
Average displacement
The motion of a body on a circular path is called what?
Circular motion
Linear motion
Angular motion
The circumference of a circular path over the time elapsed is called what?
Linear velocity
Circular motion
Straight motion
In circular motion, the angular displacement in a unit of time is called what?
Angular velocity
Circular velocity
Linear motion
Linear velocity is the product of which two quantities?
Angular velocity and radius
Angular velocity and time
Angular velocity and displacement
The S.I. unit of velocity is what?
Meter/second
Meter/hour
Meter/minute
The S.I. unit of acceleration is what?
Meter/second squared
Meter/second
Meter/hour
The S.I. unit of speed is what?
Meter/second
Meter/hour
Meter/minute
The S.I. unit of force is what?
Newton
Meter/second
Meter/second squared
The S.I. unit of displacement is what?
Meter
Meter/second
Meter/second square
The S.I. unit of linear momentum is what?
Newton second
Newton minute
Newton second squared
The S.I. unit of angular velocity is what?
Radian/second
Radian/second squared
Radian/minute
Which one of the following is neither vector nor scalar?
Moment of inertia
Impulse
Work
When the speed of a particle decreases with time, the particle is said to be what?
Retarded
Negative speed
Neither retarded nor negative speed
The rate of decrease of velocity is called what?
Retardation
Negative acceleration
Negative velocity
Which of the following is an example of three dimensional motion?
Motion in space
Motion in a plane
Motion along a line
For a moving particle the distance covered can be which of the following?
Never zero
Zero
Always zero
The distance covered by a particle does what?
Never decreases with time
Sometimes decreases
Always decreases
What does NEO stand for?
Near Earth Object
Natural Earth Orbit
No Early Observation
What happens to the speed of a comet as it gets near the Sun?
It increases
It stays the same
It decreases
The range of a projectile is at its maximum when the angle of projection is what?
45 degree
60 degree
90 degree
All bodies fall freely with which of the following?
Same acceleration
Different acceleration
Neither 1 nor 2
The acceleration of falling bodies does not depend on what?
The mass of the body
The volume of the body
The length of the body
Centripetal force is always directed towards what?
The centre of the circular path
Opposite to the centre
None of these
There can be no circular motion without what?
Centripetal force
Centrifugal force
Friction force
When a body rotates about an axis passing through its centre of mass, the motion is called what?
Spin
Circular motion
Linear motions
In which medium does sound travel fastest?
Steel
Water
Vacuum
What are sound waves in the air always?
Longitudinal
Stationary
Transverse
What is the Decibel a unit of?
Sound loudness
Intensity of light
Energy of radiation
What does the velocity of sound in gas depend upon?
Density and elasticity of gas
Pressure of gas
Wavelength of sound
What are sound waves of frequency greater than 20 kHz called?
Ultrasonic
Supersonic
Infrasonic
Most dogs are unable to hear a sound of frequency greater than what?
60,000Hz
200Hz
1000Hz
What is the branch of physics that deals with the generation, reception and propagation of sound called?
Acoustics
Ultrasonic
Reverberation
At maximum displacement in a simple harmonic motion the potential energy is which of the following?
Maximum
Minimum
Equal to kinetic energy
Which of the following is not essential for simple harmonic motion storing?
Gravity
Inertia
Restoring
In simple harmonic motion, the particle is which of the following?
Alternately accelerated and retarded
Always retarded
Always accelerated
How will the frequency of a simple pendulum vary when it is taken from the surface of the Earth to the bottom of a deep mine?
Decreases
Increases
Remains unchanged
Which of the following characteristic must remain constant for undampened oscillations of a particle?
Amplitude
Velocity
Phase
What causes dampening in oscillatory friction?
Restoring force
Friction
Both restoring force and friction
What are the three parts of an electronic system?
Input, process, output
Analogue, process, digital
Analogue, digital, output
Which of the following characteristics does not change due to the dampening of simple harmonic motion?
Initial phase
Time period
Angular frequency
How does the frequency of oscillations change due to dampening?
It decreases
It increases
It does not change
What determines the frequency of natural oscillations of a system?
Both inertia and elasticity
Elasticity alone
Inertia alone
Which of the following is not essential for the free oscillations of a mass attached to a spring?
Gravity
Inertia
Elasticity
Which type of output continually changes value and can have any value in a given range?
Analogue
Digital
Optical
When a stone is dropped into a quiet pond, the waves produced are what?
Transverse
Stationary
Longitudinal
Why do sound waves in air differ from electromagnetic waves?
They cannot be polarized
They cannot be reflected
They cannot be refracted
Which of the following theories was proposed by Albert Einstein?
Relativity theory
Law of universal gravitation
Ohm Law
Longitudinal waves cannot travel through what?
A vacuum
Solids
Gases
Why are sound waves in air not polarized?
Because they are longitudinal
Because they are transverse
Because they are progressive
In simple harmonic motion there should be a constant ratio between displacement and what?
Acceleration
Velocity
Frequency
Which of the following types of waves cannot be propagated through fluids?
Transverse waves
Progressive
Stationary
When two simple harmonic waves interfere, vector addition of which of the following characteristics takes place?
Amplitude
Frequency
Intensity
Which of the following characteristics of a sound wave are affected by a change in temperature?
Wavelength
Frequency
Intensity
In a vibrating string the frequency of the first overtone is equal to frequency of what?
The second harmonic
The first harmonic
The fundamental note
The sound of the minimum frequency emitted by a vibrating string is not termed as which of the following?
First overtone
First harmonic
Fundamental tone
For two systems to be in resonance, which of the following properties should be equal?
Frequency
Intensity
Wavelength
When we speak into a microphone, what type of vibration does the diaphragm execute?
Forced
Free
Resonant
Which type of output can only have two discrete values?
Digital
Analogue
Display screen
What does the pitch of a note depend upon?
Frequency
Intensity
Wavelength
What is the persistence of sound in a room called?
Reverberation
Resonance
Acoustics
Which of the following does not affect the reverberation time?
Frequency of the sound
Nature of the wall
Size of the auditorium
What happens when a nucleus splits?
Radiation is released
A chemical reaction occurs
A nucleus is destroyed
"Electrons in a circuit move from +ve to -ve", is this statement true?
No, not true as they always move from -ve to +ve
It depends on the source
Yes, true current flow is always +ve to -ve
Who described the theory of universal gravitation?
Isaac Newton
Guglielmo Marconi
Albert Einstein
When the loudness of a note increases what else increases?
Amplitude
Intensity
Wavelength
What does a sound need to contain to be of a rich quality?
Many harmonics
A note of high frequency
A note of high amplitude
Which of the following does not have a subjective experience?
Intensity
Pitch
Timbre
To change the quality of sound produced by an instrument, we need to vary what?
The number of overtones
Amplitude
Pitch
A major diatonic scale contains eight what?
Pure tones
Overtones
Tonic
Which of the following characteristics successively increases in the musical scale?
Pitch
Quality
Loudness
What is a pure sine wave of sound called?
Tone
Chord
Melody
What are the combination of notes that produce a jarring effect on the ear called?
Discord
Melody
Noise
What is the combination of two tones that gives a pleasing effect called?
Harmony
Chord
Beat
What is the note of lowest frequency in a musical scale called?
Tonic
Tone
Note
What causes reverberation?
Reflection
Refraction
Diffraction
What is the highest frequency in the range of human hearing?
20,000Hz
2000Hz
2000kHz
When sound waves travel from air to water which of the following remains constant?
Frequency
Velocity
Wavelength
What effect will a watch with a wound spring have if taken to the Moon?
Shows no change
Runs faster
Runs slower
In a stationary wave the strain is which of the following?
Maximum at antinodes
Maximum at nodes
Constant throughout
In which case does the potential energy decrease?
On the rising of an air bubble in water
On compressing a spring
On stretching a spring
What is resonance a special case of?
Forced vibrations
Natural vibrations
Damped vibration
Which waves are used in sonography?
Ultrasonic waves
Microwaves
Infrared waves
The Newton-Laplace formula is derived from which of the following?
Adiabatic change
Isobaric change
Isothermal change
What are the combination of two or more notes which produce a melodious effect on the ear called?
Concord
Beats
Chords
What type of waves do not require matter to carry energy?
Electromagnetic
Mechanical
Compressional
Which of the following emits sound with the highest frequency?
Mosquito
Man
Lion
The velocity of sound is greatest in which of the following materials?
Metal
Air
Water
The Doppler's effect is applicable to what?
Both light and sound waves
Light waves
Sound waves
Longitudinal strain is possible in which of the following?
Solids
Liquids
Gases
To make the frequency double on an oscillator, what do we have to do to the mass?
Reduce the mass by one fourth
Half the mass
Double the mass
Beats are produced at the regions of which of the following?
Both constructive and destructive interference
Constructive interference
Destructive interference
The mode of vibrations produced in a pipe closed at one end are which of the following?
Odd harmonics only
Even harmonics only
Both odd and even harmonic
The electric lamp was invented by whom?
Thomas Alva Edison
H. W. Seeley
Wilbur Wright
When a stone is dropped on surface of still water, the waves produced are which of the following?
Transverse
Stationary
Longitudinal
There is no net transfer of energy by particles in which of the following?
Stationary wave
Longitudinal wave
Transverse waves
In a sonometer wire the produced waves are which of the following?
Transverse Stationary and polarized
Longitudinal
Transverse Stationary up polarized
Musical beats are the result of which of the following?
Constructive and destructive interference
Diffraction
Destructive interference
What is the S.I. unit for an electric current?
Ampere
Volt
Watt
The rate of flow of charge per unit of time is called what?
Electric current
Magnetic current
Resistance
Electric current is measured by which instrument?
Ammeter
Voltmeter
Amplifier
The potential difference between two points in a circuit is measured by which instrument?
Voltmeter
Ammeter
Amplifier
What is a pure fuse made up of?
Tin
Lead
Copper
A shunt is a wire of which of the following?
Very small resistance
High resistance
Very high resistance
A transformer can be used with which of the following?
Alternate current
Direct current
Both AC and DC
What does a transformer convert?
Low voltage A.C to high voltage A.C
Low voltage A.C to high voltage D.C
High voltage D.C to low voltage A.C
What is an A.C Dynamo used to convert?
Mechanical energy into electrical energy
Electrical energy into mechanical energy
A.C into D.C
An Electric motor is a device which converts what into what?
Electrical energy into mechanical energy
Mechanical energy into electrical energy
A.C into D.C
What does a microphone convert?
Sound energy into electrical energy
Electrical energy into mechanical energy
Mechanical energy into electrical energy
What does an electric cell convert?
Electric energy from chemical energy
Electrons
Electric charge
The capacity of a storage cell is expressed in what?
Ampere hour
Ampere
Farad
Ohm's law is valid when the temperature of the conductor is which of the following?
Constant
Very low
Very high
The resistivity of a conductor depends upon its what?
Length
Resistance
Area of cross section
Which of following material cannot be used as fuse?
Carbon
Silver
Copper
What is the the unit of resistance?
Ohm
Joule
Tesla
A natural magnet is which of the following?
Oxide of iron
Oxide of copper
Oxide of silver
What is the unit of intensity of a magnetic field?
Tesla
Ohm
Joule
Magnetic lines of force are which of the following?
Closed curve
Open curve
None of these
If the magnetic lines of force are crowded, the field is which of the following?
Strong
Weak
Very weak
The process through which free electrons leave the surface of hot metals is known as what?
Thermionic emission
Proton emission
Electron emission
The Earth behaves like which type of magnet?
Bar magnet
Electric magnet
Horse shoe magnet
The angle between the geographic meridian and the magnetic meridian of the Earth is called what?
Declination
Dip
Inclination
The dipole moment per unit volume is called what?
Intensity of magnetization
Intensity of electricity
None of these
The magnetic dip is zero at which of the following?
Equator
Pole
Everywhere
The dip pole is 90 degrees at which of the following?
Magnetic dip pole
Geographical pole
Equator
Which of the following substances is not ferromagnetic?
Carbon
Iron
Copper
Which metal is the most suitable core for a transformer?
Soft iron
Copper
Silver
The line of zero dip is called which of the following?
Clinic line
Equator
Pole
A line of constant dip is called which of the following?
Isoclinic line
Clinic line
Equator
Electromagnetic induction converts what into what?
Mechanical energy into electrical energy
Electrical energy into mechanical energy
Electric energy into sound energy
What is defined as the charge transported by a steady current of one ampere in one second?
A coulomb
A joule
A watt
What is the energy in a current carrying coil stored in the form of?
Magnetic field
Electric field
Heat
A weber per square meter is equal to what?
One Tesla
One Volt
One Henry
The magnetic field of the Earth is due to what?
Motion and distribution of some material in and outside of the Earth
The Sun
Magnetic dipole
The magnetism of a magnet is due to what?
The spin motion of the electron
Cosmic rays
The Earth
The unit of intensity of an electric field is which of the following?
Newton/coulomb
Joule/coulomb
Newton/meter
What is the conductivity of a super conductor?
Infinite
Very large
Very low
Which of the following stars is the nearest to Earth?
Sun
Polestar
Comet
The S.I. unit of magnetic flux is what?
Weber
Maxwell
Tesla per square meter
The Earth is which of the following?
Semi conductor of electricity
Good conductor of electricity
Bad conductor of electricity
Lines of force, due to Earth's horizontal magnetic field are which of the following?
Curved lines
Elliptical
Concentric circles
A transformer works on the principle of mutual what?
Induction
Conversion
Inversion
A moving electron produces what?
Magnetic field
Electric field
Both Magnetic field and Electric field
An ideal choke would be which of the following?
A pure inductor
A pure resistor
A pure capacitor
Two parallel wires carrying current in opposite direction do what?
Repel each other
Attract each other
Do not affect each other
Electrons remain bound to the nucleus due to which of the following forces?
Electrostatic
Gravitational
Nuclear
A choke coil is used in:
A.C. circuit
D.C circuit
Both A.C. and D.C. circuit
The volt is equal to:
Joule/coulomb
Newton/meter
C/q
Current flows in semi-conductors through what?
Holes and electron
Holes
Electron
Alternating current is transmitted to a distant place by which of the following?
High voltage
Low voltage
High voltage to low voltage
The magnetic meridian is a what?
Vertical plane
Point
Horizontal plane
What is the largest planet in the solar system?
Jupiter
Saturn
Neptune
In which one of the following substances does the resistance decrease with an increase of temperature?
Carbon
Copper
Iron
A copper disc with a central hole is heated. What happens to the diameter of the hole?
It decreases
It increases
It remains unchanged
The quantity of electricity that deposits one gram equivalent of a substance is called what?
Faraday
Coulomb
Farad
Which of the following is a vector quantity?
Current density
Current
Power
Capacitance is the ability of a body to hold a what?
An electrical charge
A negative charge
A sound track
The phenomenon that each and every body attracts each other by the virtue of their mass is called what?
Gravitation
Gravity
Planetary force
The Earth's gravitational force is called what?
Force of gravity
Gravitational force
None of these
Earth attracts everybody towards its centre due to what?
Force of gravity
Rotation of Earth
Size of the Earth
The weight of a body is the product of which pair of quantities?
Mass and gravity
Mass and velocity
Mass and speed
The value of acceleration due to gravity is what?
9.8 meter/second squared
11.2 meter/second squared
6.2 meter/second squared
The shape of Earth is what?
Spheroidal
Spherical
Round
If two bodies of different masses, shapes and sizes are dropped in a vacuum from the same height, when do they each reach the ground?
Simultaneously
Heavy body reaches first
Lighter body reaches first
How must a voltmeter be connected to a circuit to work correctly?
In parallel
In series
In any order
How often does Halley's comet complete one revolution around the Sun?
76 years
46 years
20 years
On which planet is the gravitational force lowest?
Mercury
Venus
Earth
What is the gravitational force at the centre of Earth?
Zero
Maximum
Minimum
The Earth's gravitational force is which of the following at the pole?
Highest
Lowest
Neither
The Earth's gravitational force is which of the following at the equator?
Lowest
Highest
Neither
What causes the Earth's gravitational force to increase towards the pole?
The rotation of the Earth
The shape of the Earth
The mass of the Earth
If the Earth stopped rotating about its own axis, what would happen to the gravitational force on the pole?
It would remain unchanged
It would increase
It would decrease
If the Earth stopped rotating about its own axis, what would happen to the gravitational force on the equator?
It would increase
It would remain unchanged
It would decrease
The S.I. unit of weight is what?
Kilogram
Newton
Mole
The weight of the human body is which of the following?
Maximum at the pole
Maximum at the equator
Same at the every place of Earth's surface
Gravitational force decreases if the angular speed of Earth does what?
Increases
Decreases
Does not change
The areal velocity of planet around the Sun is always what?
Constant
Changed according to orbit
Changed according to time
If the angular speed of Earth became 17 times its present value, a body on the equator becomes what?
Weightless
Heavier than present value
Lighter than present value
The minimum velocity to project a body so that it escapes the Earth's gravitational field is called what?
Escape velocity
Gravitational velocity
Planetary velocity
For Earth, the escape velocity is equal to which of the following?
11.2 km/second
9.8 km/second
11.6 km/second
Escape velocity is also known as what?
Second cosmic velocity
Second planetary velocity
Second gravitational velocity
The escape velocity for the Moon is what?
2.4 km/second
9.8 km/second
11 km/second
Geocentric means which of the following?
Earth at the centre of our solar system
Earth at the centre of universe
Sun at the centre of our solar system
Heliocentric means which of the following?
Sun at the centre of our solar system
Earth at the centre of our solar system
Earth at the centre of universe
The velocity with which a satellite moves in orbit around the Earth is called which of the following?
Orbital velocity
Escape velocity
Satellite velocity
Which of the following cannot be used to measure time in a spaceship orbiting around the Earth?
Pendulum clock
Atomic clock
Spring clock
Which of the following causes a tidal wave in the sea due to the gravitational effect?
Moon
Earth
Sun
The unit of gravitational potential is which of the following?
Joule/kilogram
Joule
Joule kilogram
When did man first walk on the Moon?
1969
1963
1965
As the radius of the satellite orbit increases, its time period does what?
Increases
Decreases
Remains constant
In what way is an ammeter always connected to a circuit?
In series even on a parallel circuit
In series only on a series circuit
Always in parallel
Orbital velocity is independent of what?
Mass of the satellite
Radius of the orbit
Mass of the planet
What type of radiation are alpha and beta particles?
Ionizing radiation
Non-ionizing radiation
Low-energy radiation
The acceleration due to gravity (on Earth) depends upon what?
Gravitational mass of the Earth
Gravitational mass of the body
Size of the body
The average magnitude of intensity of the gravitational field on the surface of the Earth in S.I. units is about what?
10
Zero
100
If the mass and radius of a planet are doubled then acceleration due to gravity on its surface will become which of the following?
One half
One fourth
Double
Where is the intensity of the gravitational field of the Earth maximum?
Pole
Equator
Centre of the Earth
If the Earth stops rotating about its axis, the acceleration due to gravity will remain unchanged where?
At the poles
At the equator
At the centre of the Earth
The Moon has no atmosphere because of which of the following?
The escape velocity on it is small
It is not a planet
It is far away from the Earth
The relation between the time period and mean radius of the orbit of a planet about the Sun is given by which of the following?
Kevlar's law
Newton's law of gravitational
The law of conservation of the momentum
A stationary satellite of a planet orbits at which of the following?
A height independent of its own mass
A height depending upon its own mass
A height depending upon its own weight
The plane of the elliptical orbit of a satellite must pass through which of the following?
Centre of the Earth
North Pole
South Pole
The synchronous satellite of the Earth orbits from which of the following?
West to east in equatorial plane
East to west in equatorial plane
North to south in the polar plane
Which of the following is conserved in the planetary motion around the Sun?
Angular momentum
Linear momentum
Angular energy
In the case of a solid sphere, where is its gravitational potential at its minimum?
At the centre of the sphere
At the surface of the sphere
At infinity
A satellite is moved out to an orbit of larger radius. Which of the following quantities associated with it increases?
Potential energy
Kinetic energy
Orbital energy
With orbits mainly between Mars and Jupiter, what are the numerous small celestial bodies that revolve around the Sun?
Asteroids
Comet
Exteriors
The period of revolution of a geostationary satellite is what?
24 hours
30 days
365 days
The weight of a body is which of the following?
Maximum at the poles
Maximum at the equator
The same everywhere on the surface of the Earth
The hygrometer is an instrument to measure which of the following?
Relative humidity
The purity of milk
Atmospheric pressure
What is the unit of force?
Newton
Watt
Pascal
What is the unit of power?
Watt
Newton
Pascal
What is the unit of energy?
Joule
Newton
Pascal
What is the unit of pressure?
Pascal
Henry
Coulomb
What principle is a washing machine based upon?
Centrifugation
Capillarity
Diffusion
Which of the following has the same unit as the watt?
Force x velocity
Force x distance
Force x acceleration
A satellite is in a parking orbit if its period is which of the following?
Equal to the period of the Earth
More than the period of the Earth
Less than the period of the Earth
What quantity is an electric current?
Scalar quantity
Vector quantity
Both scalar and vector quantity
Electric current density is what kind of quantity?
Vector quantity
Scalar quantity
Both scalar and vector quantity
What is a coulomb a unit of?
Electric charge
Electric current
Electric field
The entire charge of a charged conductor resides on which of the following?
External surface of the conductor
Internal surface of the conductor
Both surfaces
The electrification in bodies takes place due to which of the following?
Electron
Positron
Proton
An alternating current (A.C.) is transformed into direct current (D.C.) by which of the following?
Rectifier
Motor
Transformer
The S.I. unit of potential difference is which of the following?
Volt
Ohm
Ampere
What is the S.I unit of volume?
Cubic meter
Cubic feet
Square meter
What is the S.I unit of length?
Meter
Centimeter
Inch
What is the S.I unit of electric power?
kilowatt-hour
Newton
Pascal
What is the resistance value of an ideal ammeter?
Zero
One
Infinity
An ideal voltmeter has what value of resistance?
Infinity
One
Zero
Domestic appliances like bulbs, fans and refrigerators are attached in which of the following manner?
Parallel
Series
Mixed
The S.I unit of specific resistance is which of the following?
Ohm-meter
Ohm
Ohm/meter
In a dry cell which type of energy exists?
Chemical
Mechanical
Electrical
Which law is based upon the basic concept of electric flux?
Gauss's law
Lenz's law
Coulombs law
The filament of an electric bulb is made of what?
Tungsten
Licorice
Iron
The coil of an electric heater is made of which metal or alloy?
Nichrome
Copper
Aluminum
Which of these electric appliances will consume the most electricity?
Electric iron
Electric fan
Study lamp
Which is the fifth largest planet in our solar system?
Earth
Venus
Mercury
Who was the inventor of the lighting conductor?
Lord Leister
Graham Bell
Einstein
The transformer is an electrical device which converts/regulates which of the following?
AC voltage up or down
AC into DC
DC into AC
What are two of the most popular semiconductors which are frequently utilized in solid state electronic devices?
Germanium and silicon
Germanium and carbon
Silicon and carbon
Which of the following is the pure form of a semiconductor?
Intrinsic
Extrinsic
Both of these
In the p-type semiconductor the current mainly flows due to which of the following?
Holes
Electrons
Both of these
Photoelectric effect occurs only in the light of which of the following?
Threshold wavelength
Any wavelength
Neither of these
On the basis of what theory was the photoelectric effect fully explained?
Quantum theory
Wave theory
Any of these
What is the the photoelectric effect in gas called?
Ionization
Electrolysis
Electrification
The photoelectric effect through visible light is possible only through which of the following?
Alkali metals
Coinage metals
Any metals
What is Lenz's law relate to?
The conservation of energy
The conservation of electric current
The conservation of electric charge
The properties of gamma rays are which of the following?
Neutral
Negatively charged
Positively charged
The energy E of a photon does not depend on its what?
Size
Wavelength
Frequency
In what way is a voltmeter always connected to a circuit?
In parallel even on a series circuit
In series only on a series circuit
Always in series
Which of the following electromagnetic waves is least energetic?
Infra-red rays
X-rays
Ultra-violet rays
If the fraction of an atom's radioactive material left over 120 years is 1/64, what is the half-life of the material?
20 years
2 years
24 years
The process of energy production in the Sun is called what?
Nuclear fusion
Nuclear fission
Electron collision
The particle that is responsible for nuclear fission in a nuclear reactor is called what?
Neutron
Proton
Photon
The frequency of sound waves in the audible range is which of the following?
2O Hz-2000 Hz
O.5 Hz-5 Hz
1 Hz-10Hz
Ultrasound waves have frequency of which of the following?
More than 20 Hz
Less than 20 Hz
More than 20000 Hz
The speed of sound varies from substance to substance. In what does Sound travel the fastest?
Steel
Air
Vacuum
The velocity of sound in a vacuum is what?
330m/sec
220m/sec
110m/sec
A sound wave is which of the following?
Longitudinal and mechanical
Transverse and mechanical
Magnetic and mechanical
Infrasonic waves have frequency of which of the following?
Less than 20 Hz
More than 20 Hz
More than 20000 Hz
The matter that supports sound is called?
The medium
The noise
The vacuum
If a guitar and a flute are tuned in unison then the sound produced by each can be distinguished by which of the following?
Only pitch and timbre
Only quality
Only timbre
On the surface of the Moon, why wouldn't you hear any sound?
Because there is no atmosphere on the Moon
Because on the Moon sound travels at a low frequency
Because on the Moon sound travel very slowly
Which of the following quantities is measured in decibels?
The intensity of sound
The speed of light
The intensity of heat
An echo is produced by sound waves due to what?
The reflection of sound
The scattering of sound
The refraction of sound
What systems is SONAR frequently used by?
Navigation
Doctor
Astronauts
The pitch of frequency of a police siren coming at you appears to be increasing because of what effect?
Doppler's effect
Big-bang theory
Charles's law
A light wave is which of the following?
Transverse wave
Longitudinal wave
Both transverse and longitudinal
The nature of light radiation is which of the following?
Wave and particle
Wave
Particle
What is the approximate velocity of light in a vacuum?
300,000 km per second
186,000 km per second
300,000 km per hour
The phenomenon of interference can be obtained by what?
A diffraction pattern
A interference pattern
A polarization pattern
What is the device called through which the intensity of the Sun's rays is measured?
Actinometer
Astrometry
Thermometer
What is Solar radiation commonly measured with?
Pyranometer
Barometer
Actinometer
Newton's formula for the velocity of sound is wrong because of his consideration of the propagation of sound as which of the following?
Isothermal process
Adiabatic process
Both of these
Which of the following statements is correct?
Sound cannot travel through a vacuum
Light cannot travel through a vacuum
Neither sound nor light can travel through a vacuum
A source of frequency 500 hertz emits waves of wavelength 0.2 m. The time the wave takes to travel a distance of 100 m is which of the following?
1 second
2 seconds
2.5 seconds
If the distance from a point source of sound is doubled, by what factor does the intensity decrease?
0.25
2
0.5
The velocity of sound in air will be doubled, if its absolute temperature is what?
Quadrupled
Halved
Doubled
What is work a product of?
Force and displacement
Force and energy
Force and power
Work is a what?
Scalar quantity
Vector quantity
Neither scalar nor vector
What is the S.I. unit of work?
Joule
Watt
Newton
If a body gets displaced when a force acts on it, what is said to have happened?
Work done
Displacement
Force
What is the capacity to do work by a body called?
Energy
Work
Power
Energy is what?
A scalar quantity
A vector quantity
Neither scalar nor vector
What is the energy of an object due to its position or configuration called?
Potential energy
Kinetic energy
Magnetic energy
What is potential energy associated with?
Mass in gravitational field
Energy in gravitational field
Weight in gravitational field
Potential energy is the product of what?
Mass, acceleration due to gravity and height of the body from the Earth's surface
Mass, gravity and force
Mass, acceleration and velocity
What is energy due to motion called?
Kinetic energy
Potential energy
Mechanical energy
Kinetic energy is the product of what?
1/2, mass and velocity square
1/2, mass and velocity
1/2, mass and speed
The energy of a spring in a watch is an example of what?
Potential energy
Kinetic energy
Mechanical energy
The energy of running water is an example of what?
Kinetic energy
Potential energy
Electrical energy
The rate of doing work is called what?
Power
Energy
Heat
Work over time is called what?
Power
Energy
Heat
One horse power(hp) is equal to what?
746 W
776 W
764 W
Kinetic energy is always which of the following?
Positive
Negative
Both
When work is done on a body, kinetic or potential energy does what?
Increases
Decreases
Remain same
When work is done by a body, kinetic or potential energy does what?
Decreases
Increases
Remain same
The total energy of the universe is which of the following?
Constant
Increases
Decreases
When a force applied is opposing the direction of motion of a body, the work done is which of the following?
Negative
Positive
Zero
The work done on a body does not depend upon which of the following?
Initial velocity of the body
Force applied
Displacement
A ball is projected upward. As it rises which of the following increases?
Its potential energy
Its kinetic energy
Its momentum
If the momentum of a body is doubled, the kinetic energy does what?
Increases four times
Halves
Is unchanged
When the mass and speed of a body are doubled, the kinetic energy of the body does what?
Becomes eight times greater
Becomes four times greater
Is unchanged
Which of the following is a non-conservative force?
Viscous force
Gravitational force
Electric force
The stopping distance of a vehicle is equal to which of the following?
Kinetic energy/stopping force
Potential energy/stopping force
Neither of these
Potential energy is negative when forces do which of the following?
Attract
Repulse
Neutral
If rails are on a plane surface and there is no friction, the power dissipated by an engine on the rails is which of the following?
Zero
Doubled
Halved
Which of the following is not a unit of power?
Joule
Horsepower
Watt
Work done by centripetal force is what?
Always zero
Sometimes zero
Never zero
A weightlifter holds a weight above his head. In this position, the weightlifter is doing what?
No work
Some work
Absolute work
A reservoir is an example of what?
Potential energy
Kinetic energy
Magnetic energy
What are electromagnetic waves not affected by?
Electric and magnetic fields
Only electric field
Only magnetic field
On what basis is the electromagnetic waves spectrum classified?
Manner of production of the waves
Independent of production of the waves
Both
Which of the following waves is used in radar systems for aircraft navigation?
Radio waves
Infrared
Visible light
Which of the following waves is used for cooking?
Microwaves
Infrared
Visible light
What are infrared waves also known as?
Heat waves
Light waves
Microwaves
What are infrared waves produced by?
Hot bodies and molecules
Magnet
Electric current
Which of the following waves are used for taking photographs during foggy or smokey conditions?
Infrared
Microwaves
Ultraviolet
Who discovered ultraviolet rays?
Johann Wilhelm Ritter
Wilhelm Conrad Rontgen
William Herschel
Who discovered infrared waves?
William Herschel
Johann Wilhelm Ritter
Wilhelm Conrad Rontgen
Who discovered X-rays?
Wilhelm Conrad Rontgen
William Herschel
Johann Wilhelm Ritter
What kind of waves allow light to travel in a vacuum?
Electromagnetic waves
Mechanical waves
None of these
What are optical waves used in?
Optical fibre communication
Night photography
In radar systems
The speed at which both microwaves and optical waves travel are the same in what?
A vacuum
Air
Water
Short wave band is used for the transmission of radio waves over which of the following?
A large distance
A short distance
A very short distance
Which layer of atmosphere are short waves reflected from?
Ionosphere
Ozonosphere
Stratosphere
Electromagnetic waves are which of the following?
Transverse in nature
Longitudinal in nature
Both
The speed of electromagnetic waves are the same in which case?
For all intensities
In all medium
For all wavelengths
Microwaves are electromagnetic waves with frequency in which range?
A giga hertz
A mega hertz
A micro hertz
What does Maxwell's equation describe the fundamental law of?
Electricity and magnetism
Only electricity
Only magnetism
Which of the following is not true for electromagnetic waves?
They travel at different speeds in air
They have momentum
They transport energy
What is the correct arrangement of colors in descending order of their wavelength?
Orange, yellow, green, violet
Yellow, green, orange, violet
Violet, orange, green, yellow
The electric and magnetic fields of electromagnetic waves are which of the following?
In phase and perpendicular to each other
In opposite phase and parallel to each other
In phase and parallel to each other
Which of the following groups of electromagnetic waves are in the order of increasing frequency?
Microwaves, ultraviolet, X-rays
Gamma rays, visible light, ultraviolet rays
Gamma rays, ultraviolet rays, radio waves
In which year was the first Nobel Prize in Physics awarded?
1901
1900
1968
Which property of the electromagnetic wave does not change with the change of medium?
Frequency of wave
Speed of wave
Wave length of wave
Where is the center of mass of a disc?
Center
Midpoint of axis
Both
What is the center of mass of a cubic block?
Point of intersection of the diagonals
Midpoint of axis
Center
The location of the center of mass does not depend on which of the following?
Forces acting on the system
Shape
Nature of the distribution of the mass
The location of the center of mass remains unchanged in which of the following?
Rotary motion
Translatory motion
Oscillatory motion
The moment of inertia of a body does not depend upon which of the following?
Angular speed
Mass of the body
Nature of the distribution of the mass
With the same mass and radius, which has the largest moment of inertia?
A ring
A solid sphere
A disc
If the Earth shrinks to half of its radius without change in mass, what will be the duration of a day?
6 hours
24 hours
48 hours
In the overall state of a physical system, what is the moment of momentum?
Angular momentum
Moment of inertia
Moment of force
Which of the following is an axial vector?
Torque
Moment of inertia
Acceleration
What is the angular acceleration of a particle moving along a circular path with constant speed?
Zero
Uniform
Variable
Which object will have the greatest rotational energy?
Ring
Solid sphere
Uniform rod
Which object has the lowest rotational energy?
Solid sphere
Ring uniform rod
Uniform rod
Who was the inventor of optical fiber?
Narinder Kapany
James Chadwick
Pieter Zeeman
The collision of bodies implies which of the following?
The mutual interaction of two bodies
The change of frame of reference
The loss of energy
In what type of collision is kinetic energy conserved?
Elastic collision
Inelastic collision
Perfectly inelastic collision
In what type of collision is kinetic energy not conserved?
Inelastic collision
Elastic collision
Perfectly elastic collision
What is a device that converts mechanical energy to electrical energy called?
Electric generator
Motor
Inverter
Which of the following is an example of a two dimensional collision?
Oblique collision
Elastic collision
Perfectly inelastic collision
The momentum of a system is conserved in which of the following conditions?
Both in elastic collision and inelastic collision
Only in elastic collision
Only in inelastic collision
Which of the following is not conserved during collision?
Mass
Momentum
Total energy
What type of collision does not produce sound and heat?
Elastic collision
Inelastic collision
Perfectly Inelastic collision
In which type of collision do two bodies stick together?
Perfectly inelastic collision
Elastic collision
Inelastic collision
A bullet strikes against a wooden block and is embedded in it. What is the nature of this collision?
Perfectly inelastic collision
Elastic collision
Inelastic collision
From the theory of relativity, the statement "all the inertial frames are equivalent" is called the principle of what?
Correspondence
Equivalence
Inertia
Who widened the scope of the principle of relativity to encompass all the branches of physics?
Galileo
Newton
Einstein
In what year did Einstein propose the special theory of relativity?
1905
1910
1915
Whose experimental work proved that the velocity of light is a universal and natural constant?
James Clerk Maxwell
Albert Einstein
Hendrik Lorentz
Which transformation (in connection with the special theory of relativity) deals with the observation of two observers in different inertial frames?
Lorentz
Galilean
Newton
Which of the following is not the consequence of the 'special theory of relativity'?
Mass is condensed in the form of energy
Energy is conserved
Mass can be annihilated
In which of the velocity ranges is the velocity of a particle directly proportional to the time elapsed?
Relativistic
Newtonian
Ultra relativistic
Who speculated that our universe is expanding?
Edwin Hubble
Isaac Newton
Galileo Galilei
Who demonstrated that the observed motions of celestial objects can be explained without putting Earth in the center of the universe?
Nicolaus Copernicus
Alexander Arastu
Galileo Galilei
Which of the following elements occur most abundantly in our universe?
Hydrogen
Nitrogen
Helium
Stellar energy sources are examples of what?
Nuclear fusion
Nuclear fission
Electromagnetic induction
What is the device employed to measure the diameter of the stars in our galaxy called?
Interferometer
Barometer
Viscometer
Name two planets which have no satellites.
Mercury and Venus
Venus and Mars
Mercury and Mars
Name the planet which has the largest number of satellites.
Saturn
Jupiter
Mars
Which of the following planets is called the Morning star and the Evening star?
Venus
Jupiter
Mars
Which planet completes one revolution around the Sun every 88 days?
Mercury
Venus
Mars
Which planet has a density less than water?
Saturn
Jupiter
Mars
What is the temperature of the surface of the Sun?
6000k
7000k
2000k
Which scientific principle best demonstrates why an object floats in a liquid that is denser than itself?
Archimedes Principle
Boyles Law
Upwards Thrust Principle
How are energy and power related?
Power is the rate of energy generated or used
Energy is the rate of power generated or used
Energy is measured in Watts
What is the only force acting on a body during free fall?
Gravity
Friction
Magnetic
How can the acceleration of a free-falling object be described?
Constant and downward
Variable and downward
Constant and upward
The laws of motion were first compiled by Sir Isaac Newton in his work Philosophiae Naturalis Principia Mathematica. How many laws of motion are there?
Three
Four
Five
When were Euler's laws of motion formulated?
50 years before Isaac Newton
50 years after Isaac Newton
90 years after Isaac Newton
What captures radiation from the Sun and transforms it into electrical energy?
Solar Cells
Hydro-electric panels
Geothermal panels
What does an isotope of a chemical element have a differing number of?
Neutrons
Protons
Electrons
What will materials with the same charge do to each other?
Repel each other
Attract each other
Cancel each other
How many parts is an atom made of?
3: Protons, neutrons and electrons
3: Isotopes, protons and electrons
5: Nuclei, isotopes, protons, neutrons and electrons
A motor uses 400 J to lift a load. What is the efficiency of the motor if the load gains 280 J of potential energy?
70%
25%
56%
Communication signals pick up unwanted interference. What are these unwanted signals called?
Noise
Amplitude
Frequency
When comparing analogue to digital signals which of the following statements is false?
Both signals vary continuously
They both weaken with distance
Only digital is affected by interference
When viewed from Earth, which way do other galaxies seem to be moving?
Moving away from us
Moving towards us
Not moving at all
The greater the mass of an object, the greater its velocity and the more momentum the object has. Which of the below is also correct?
Momentum = Mass x Velocity
Momentum = Weight x Velocity
Momentum = Mass x Acceleration
When synthetic clothes are dragged over each other, as in a tumble drier, electrons get scrapped off of the surface of both garments. What does this result in?
A static charge on both garments
A static charge on all dark colored garments
The garments repel each other
If an eagle and a sparrow are both traveling at 10 km/h, which has the greater momentum?
Eagle
Sparrow
The same
Which of the statements below is incorrect?
Energy can be destroyed or transformed
Energy can change from one form to another
Useful energy can be used to warm a room
Which of the following units is a unit of energy?
Joule
Pascal
Tesla
What does Newton's second law of motion assume that apples have a mass of?
Doesn't make any assumptions on apples
9.81 m/s the speed of a free falling apple
1 kg
What is the mathematically defined surface around a black hole known as?
Event Horizon
Black Bits
Milky Way
Who found the first modern solution of general relativity containing a black hole?
Karl Schwarzschild
Pierre-Simon Laplace
Albert Einstein
In physics, a wormhole is a hypothetical topological feature of space-time. What is that in layman's terms?
A "shortcut" through space-time
An event horizon displacement
A dangerous way to travel
The International System of Units (SI) defines how many base units?
Seven
Twelve
Fourteen
Which of the following is not an SI base unit?
Newton
Kilogram
Ampere
