What is the displacement of body per unit time called?
Velocity
Acceleration
Force
Who widened the scope of the principle of relativity to encompass all the branches of physics?
Galileo
Newton
Einstein
Which of the following characteristics does not change due to the dampening of simple harmonic motion?
Initial phase
Time period
Angular frequency
A glass slab is placed over colored letters. Which letters appear the least raised?
Red
Blue
Violet
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
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
The stopping distance of a vehicle is equal to which of the following?
Kinetic energy/stopping force
Potential energy/stopping force
Neither of these
Why are sound waves in air not polarized?
Because they are longitudinal
Because they are transverse
Because they are progressive
A light wave is which of the following?
Transverse wave
Longitudinal wave
Both transverse and longitudinal
Earth attracts everybody towards its centre due to what?
Force of gravity
Rotation of Earth
Size of the Earth
On what is a Thermocouple thermometer based?
The law of thermodynamics
The Pettier effect
The Photoelectric effect
For two systems to be in resonance, which of the following properties should be equal?
Frequency
Intensity
Wavelength
What is the failure of light to travel in a straight line known as?
Diffraction
Dispersion
Refraction
The S.I. unit of angular velocity is what?
Radian/second
Radian/second squared
Radian/minute
What does a sudden fall of air pressure in a brief period of time indicate?
A storm
Rain
A cold front
What is the S.I unit of volume?
Cubic meter
Cubic feet
Square meter
Who achieved the first nuclear transmutation or artificial disintegration of atomic nucleus?
Rutherford
Chadwick
Heisenberg
What effect will a watch with a wound spring have if taken to the Moon?
Shows no change
Runs faster
Runs slower
What are Newton's laws of cooling used for the determination of?
Latent heat of solids
Specific heat of solids
Latent heat of liquids
What principle is a washing machine based upon?
Centrifugation
Capillarity
Diffusion
With the same mass and radius, which has the largest moment of inertia?
A ring
A solid sphere
A disc
What are radiotherapy X-rays used for?
To treat cancer
To detect bone fracture
To detect heart disease
What is a device that converts mechanical energy to electrical energy called?
Electric generator
Motor
Inverter
What is the internal energy of a perfect gas independent of?
Temperature
Pressure
Volume
Which of the following is also called the 'blue planet' or 'green planet'?
Earth
Mars
Venus
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
Which of the following quantities is expressed as force per unit area?
Pressure
Work
Volume
The pole star is a part of which constellation?
Ursa minor
Ursa major
Orion
A transformer can be used with which of the following?
Alternate current
Direct current
Both AC and DC
The Earth's gravitational force is which of the following at the equator?
Lowest
Highest
Neither
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
Which of the following is NOT a projectile?
A rocket fired into space
A bullet fired from the gun
A ball thrown upwards
The process of energy production in the Sun is called what?
Nuclear fusion
Nuclear fission
Electron collision
The unit of gravitational potential is which of the following?
Joule/kilogram
Joule
Joule kilogram
Which one of the following is a vector quantity?
Impulse
Time
Length
What happens to the speed of a comet as it gets near the Sun?
It increases
It stays the same
It decreases
Moving with the same velocity, which of the following has the largest wavelength of matter waves?
Beta particles
Proton
Neutron
A particle in uniform motion can possess what?
Radial acceleration
Tangential acceleration
Both radial and tangential acceleration
What happens to the magnifying powers of a microscope as its length increases?
It increases
It decreases
It remains unchanged
The total distance traveled by a body over total time elapsed is called what?
Average speed
Average velocity
Displacement
Which of the following characteristics successively increases in the musical scale?
Pitch
Quality
Loudness
Which of the following is an axial vector?
Torque
Moment of inertia
Acceleration
What does the letter 'A' stand for in the acronym LASER?
Amplification
Amplitude
Alternating
Centripetal force is always directed towards what?
The centre of the circular path
Opposite to the centre
None of these
For a particle moving along a circular path with constant speed, the acceleration is constant in what?
Magnitude
Direction
Both magnitude and direction
Who discovered the neutron?
Chadwick
Rutherford
Millikan
What is the unit of force?
Newton
Watt
Pascal
What is color related to?
Frequency
Amplitude
Quality
What does the infrared spectrum lie between?
Microwaves and visible light
Radio waves and microwaves
Ultraviolet and X-rays
What is the Parsec a unit of?
Length
Mass
Velocity
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 matter that supports sound is called?
The medium
The noise
The vacuum
One horse power(hp) is equal to what?
746 W
776 W
764 W
In the nucleus of uranium-235 there are what?
A total of 235 protons and neutrons
235 protons
235 neutrons
Viscosity is a transport phenomena explained by using the concept of transfer of what?
Momentum
Mass
Potential energy
In the long jump when does the athlete experience maximum force?
On taking off
On landing
At the maximum height
What are alpha particles?
Helium nuclei
Fast moving electrons
Electromagnetic rays
Gravitational force decreases if the angular speed of Earth does what?
Increases
Decreases
Does not change
What is the device called through which the intensity of the Sun's rays is measured?
Actinometer
Astrometry
Thermometer
What does thermal conductivity depend upon?
The nature of the material
The heat produced
The difference in temperature
The x-ray detection of fracture in bones is based on what?
Shadow photography
Ionization
Photoelectric emission
What is the Young's modulus of air?
Zero
Infinity
One
What is energy due to motion called?
Kinetic energy
Potential energy
Mechanical energy
In which of the following emissions does the electronic structure have no effect?
Gamma rays
Beta rays
X-rays
How does the angle of contact change with the increase in temperature?
It decreases
It increases
It remains unchanged
The electric lamp was invented by whom?
Thomas Alva Edison
H. W. Seeley
Wilbur Wright
What does the 'L' in LASER stand for?
Light
Lunar
Lunch
Communication signals pick up unwanted interference. What are these unwanted signals called?
Noise
Amplitude
Frequency
The areal velocity of planet around the Sun is always what?
Constant
Changed according to orbit
Changed according to time
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
What controls the amount of light reaching the retina of the eye?
The iris
The pupil
The cilliary muscle
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
In simple harmonic motion, the particle is which of the following?
Alternately accelerated and retarded
Always retarded
Always accelerated
What can Huygen's wave theory of light not explain?
The photoelectric effect
Diffraction
Interference
The free surface of a liquid tends to the minimum possible area. This happens due to what?
Surface tension
Gravity
Fluidity
What is the S.I unit of length?
Meter
Centimeter
Inch
Which one of the following phenomena is not explained by Huygen's construction of a wave front?
Origin of spectrum
Refraction
Diffraction
Which law does a constant volume gas thermometer work on?
Charles law
Boyle's law
Pascal law
Who was color television invented by?
John Logie Baird
Maxwell
Newton
In a nuclear reactor, what are the cadmium rods used for?
Absorb the neutrons
Slow down the neutrons
Generate neutrons
Which is the only planet on which the Sun rises in the west?
Venus
Uranus
Pluto
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
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
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
What is the persistence of sound in a room called?
Reverberation
Resonance
Acoustics
Which of the following is called the red planet?
Mars
Venus
Mercury
Which is the heaviest among the inner planets?
Earth
Mercury
Venus
Which property of the electromagnetic wave does not change with the change of medium?
Frequency of wave
Speed of wave
Wave length of wave
In a vacuum, the speed of light:
Is constant
Depends upon wavelength
Depends upon Color
Light from the nearest star (other than the Sun) reaches the Earth in how many years?
4.2 years
4.2 seconds
44 years
What will materials with the same charge do to each other?
Repel each other
Attract each other
Cancel each other
For which color is the angle of deviation the least?
Red
Violet
Blue
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
What does the nucleus of an atom contain?
Protons and neutrons
Protons and electrons
Only neutrons
The quantity of electricity that deposits one gram equivalent of a substance is called what?
Faraday
Coulomb
Farad
The escape velocity for the Moon is what?
2.4 km/second
9.8 km/second
11 km/second
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
What is the absorption coefficient of thermal radiation for a perfectly black body?
More than one
Less than one
One
Surface tension does not depend upon what?
Atmospheric pressure
Temperature
Nature of the liquid
What happens to the coefficient of friction, when the normal reaction is halved?
No change
Doubled
Halved
