What determines the frequency of natural oscillations of a system?
Both inertia and elasticity
Elasticity alone
Inertia alone
The study of the photoelectric effect is useful in understanding what?
Quantization of energy
Quantization of charge
Conservation of charge
Beats are produced at the regions of which of the following?
Both constructive and destructive interference
Constructive interference
Destructive interference
Which is the main scientific theory for the origin of the universe?
The Big Bang
The Oscillating Universe
The Steady State
What type of waves do not require matter to carry energy?
Electromagnetic
Mechanical
Compressional
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
When a body is moving on a surface, what is the force of friction called?
Dynamic friction
Static frication
Limiting friction
The magnetic meridian is a what?
Vertical plane
Point
Horizontal plane
A ray of light passes from a rarer to a denser medium. What physical quantity remains unchanged?
Frequency
Velocity
Wavelength
For Earth, the escape velocity is equal to which of the following?
11.2 km/second
9.8 km/second
11.6 km/second
What law do hydraulic brakes work on the basis of?
Pascal's law
Gravitational law
Archimedes principle
What does the pitch of a note depend upon?
Frequency
Intensity
Wavelength
A reservoir is an example of what?
Potential energy
Kinetic energy
Magnetic energy
Momentum is the product of what?
Mass and velocity
Mass and acceleration
Mass and force
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
Why does the sky appear blue?
Because blue light is scattered the most
Because blue light is absorbed
Because it is its natural color
How do signals travel through optical fibers?
As infrared
As microwaves
As radio waves
Ionic crystals can be very what?
Brittle
Hard
Soft
What systems is SONAR frequently used by?
Navigation
Doctor
Astronauts
Which of the following is not a part of our Solar system?
Quasars
Meteors
Comets
From what do we get energy directly?
The Sun
Ocean
Atmosphere
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
As the radius of the satellite orbit increases, its time period does what?
Increases
Decreases
Remains constant
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
The distance traveled by light in vacuum in one year is called what?
Light year
Parsec
Astronomical units
Which of the following is not used as a unit of length?
Radian
Micron
Light year
Which surfaces are the best absorbers of radiation?
Dark dull surfaces
Light shiny surfaces
Light dull surfaces
What are the properties of optical fiber based on?
Total internal reflection
Less scattering
Less absorption coefficient
When work is done by a body, kinetic or potential energy does what?
Decreases
Increases
Remain same
What does the kinetic energy of molecular motion appear as?
Temperature
Heat
Potential energy
Which of the following is not a unit of power?
Joule
Horsepower
Watt
Which of the following is a non-conservative force?
Viscous force
Gravitational force
Electric force
With the increase of temperature, what happens to the Young's modulus?
It decreases
It increases
It remains constant
Which of the following is not a property of photons?
Rest mass
Energy
Momentum
Which of the following is not a primary color?
Orange
Red
Blue
Why do the Sun and the Moon appear elliptical near the horizon?
An optical illusion
Interference
Actual change in shapes
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 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 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
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
What is the gravitational force at the centre of Earth?
Zero
Maximum
Minimum
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
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
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
What is work a product of?
Force and displacement
Force and energy
Force and power
In which one of the following substances does the resistance decrease with an increase of temperature?
Carbon
Copper
Iron
What type of light does a polarizer device convert a beam to?
Electromagnetic waves
Liquid crystal display
Intensity of light
Infrasonic waves have frequency of which of the following?
Less than 20 Hz
More than 20 Hz
More than 20000 Hz
Which of the following planets is called the Morning star and the Evening star?
Venus
Jupiter
Mars
Who was the inventor of the lighting conductor?
Lord Leister
Graham Bell
Einstein
Who was the inventor of optical fiber?
Narinder Kapany
James Chadwick
Pieter Zeeman
Where is the center of mass of a disc?
Center
Midpoint of axis
Both
Which of the following is the best container for gas during an adiabatic process?
Thermos flask
Glass vessel
Wood vessel
Who found the first modern solution of general relativity containing a black hole?
Karl Schwarzschild
Pierre-Simon Laplace
Albert Einstein
Which metal is the most suitable core for a transformer?
Soft iron
Copper
Silver
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
The circumference of a circular path over the time elapsed is called what?
Linear velocity
Circular motion
Straight motion
Which of the following planets is considered a twin sister of Earth?
Venus
Mars
Jupiter
Which waves are used in sonography?
Ultrasonic waves
Microwaves
Infrared waves
What does Maxwell's equation describe the fundamental law of?
Electricity and magnetism
Only electricity
Only magnetism
Which object is the densest?
Neutron star
Supernova
Black hole
The hydrogen bomb is based on the principal of what?
Uncontrolled fusion reaction
Controlled fission reaction
Uncontrolled fission reaction
Radiocarbon dating techniques are used to estimate the age of what?
Fossils
Rocks
Soil
When two simple harmonic waves interfere, vector addition of which of the following characteristics takes place?
Amplitude
Frequency
Intensity
The photoelectric effect through visible light is possible only through which of the following?
Alkali metals
Coinage metals
Any metals
Potential energy is negative when forces do which of the following?
Attract
Repulse
Neutral
The phenomenon of interference can be obtained by what?
A diffraction pattern
A interference pattern
A polarization pattern
Who proved that photons possess momentum?
Compton
Planck
Bohr
The image of an object formed in a plain mirror:
Is virtual
Is real
Is invisible
What makes the bristles of a shaving brush cling together when taken out of water?
Surface tension
Gravity
Fluidity
In the overall state of a physical system, what is the moment of momentum?
Angular momentum
Moment of inertia
Moment of force
How does the frequency of oscillations change due to dampening?
It decreases
It increases
It does not change
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
On what law is the Hubble law based?
Doppler law
Law of gravitation
Stefan's law
Which of the following has the same unit as the watt?
Force x velocity
Force x distance
Force x acceleration
The Sun remains visible for some time after it actually sets below the horizon. Why does this happen?
Atmospheric refraction
Scattering of light
Dispersion
The S.I. unit of linear momentum is what?
Newton second
Newton minute
Newton second squared
What does a spherical bubble in water behave as?
Concave lens
Convex lens
Concave mirror
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
The acceleration due to gravity (on Earth) depends upon what?
Gravitational mass of the Earth
Gravitational mass of the body
Size of the body
When an axle rotates in a sleeve, the friction involved in the process is what?
Sliding
Rolling
Limiting
Work done by centripetal force is what?
Always zero
Sometimes zero
Never zero
In which type of collision do two bodies stick together?
Perfectly inelastic collision
Elastic collision
Inelastic collision
Which of the following provides the warmth in sunlight?
Infrared rays
Visible light
Ultraviolet rays
How is the image formed in an astronomical telescope?
Inverted and virtual
Erect and virtual
Real and erect
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
In simple harmonic motion there should be a constant ratio between displacement and what?
Acceleration
Velocity
Frequency
What type of mirror is used in car headlamps?
A cylindrical mirror
A concave mirror
A convex mirror
Rocks of which planet are likely to float on water?
Saturn
Mars
Jupiter
Momentum is a what?
Vector quantity
Scalar quantity
Neither vector nor scalar
The volt is equal to:
Joule/coulomb
Newton/meter
C/q
In what is Boyle's law applicable?
An Isothermal process
An Isochoric process
An Isobaric process
The volume of the nucleus is proportional to its what?
Mass number
Number of protons
Atomic number
What causes colors to appear on a thin soap film and on soap bubbles?
Interference
Refraction
Diffraction
Which of following material cannot be used as fuse?
Carbon
Silver
Copper
What do we determine with a mass spectrograph?
Specific charge
Wavelength
Charge
The dipole moment per unit volume is called what?
Intensity of magnetization
Intensity of electricity
None of these
What are infrared waves produced by?
Hot bodies and molecules
Magnet
Electric current
The Earth's gravitational force is which of the following at the pole?
Highest
Lowest
Neither
Work over time is called what?
Power
Energy
Heat
