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4

On applying a constant force to a mass, It moves with a uniform

A. velocity

B. momentum

C. acceleration

D. angular velocity

Correct Answer :

C. acceleration


Related Questions

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When temperature decreases, resistance of metals to flow of electricity

A. increases

B. decreases

C. neither increases nor decreases

D. first increases then decreases

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4

When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light ray diminishes alter a few reflections. This is because of

A. poor reflection from the mirrors

B. scattering of light from the mirrors

C. absorption of some light by the mirrors

D. absorption of light by the atmosphere

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4

A man Jumping out of a moving train is thrown

A. forward

B. backward

C. sideways

D. None of the above

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A cyclist leans inwards when he is negotiating a curve 10 that

A. he may increase his speed

B. his weight may be reduced

C. necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion

D. no frictional force may be produced between the wheels and the axle

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4

Which is the densest planet of the solar system?

A. Sun

B. Jupiter

C. Mercury

D. Earth

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A transformer

A. converts direct current into alternating current

B. converts alternating current into direct current

C. steps up or steps down a given alternating current voltage

D. supplies current with zero resistance

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4

The completely dark portion of a shadow of an object is known as

A. umbra

B. penumbra

C. image

D. black portion of light

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4

Powder clings to the skin because of

A. cohesion

B. adhesion

C. capillary action

D. absorption

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4

Which of the following pairs is not correct?

A. Television - Baird

B. Transistor ~ Shockley

C. Thermometer - Celsius

D. Barometer Torricelli

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4

The acoustical quality of a room depends on

A. the size and shape of the room

B. the ability of the ceiling, walls and floor to exclude unwanted sound

C. the use of furnishings made of sound absorbing materials

D. All the above

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4

Ultrasonic waves are used

A. in medical and surgical diagnosis

B. in testing the quality of the linings and pads used in vehicles and aircraft brakes

C. to clean surgical instruments, jewellery and similar articles

D. All the above

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4

The device that is used to measure the electromotive force of a cell is

A. an ammeter

B. a rheostat

C. a voltmeter

D. a voltameter

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4

Out of the following which is an insulator?

A. Silver

B. Copper

C. Nichrome

D. Dry wood

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4

The speed of sound in a medium depends upon the properties of the medium such as

A. its density

B. its temperature

C. its elasticity

D. All the above

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A permanent magnet may be demagnetised by

A. placing it inside a solenoid through which an alternating current is flowing

B. heating the magnet to redness and then allowing it to cool

C. dropping it several times or hammering it while lying east-west

D. All the above

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4

The weight of a body is

A. maximum at the equator

B. minimum at the equator

C. minimum at the poles

D. the same everywhere

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4

Which part of the eye photographic camera?

A. Lens

B. Iris

C. Retina

D. Eyelid

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The velocity of sound in a medium is

A. directly proportional to its pressure

B. inversely proportional to the square root of its pressure

C. directly proportional to the square root of its pressure

D. independent of its pressure

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4

The escape velocity of a satellite projected from the surface of the earth is independent of

A. the mass of earth

B. the mass of the satellite

C. the radius of the earth

D. gravitation of the earth

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4

Of the following which has got the highest frequency?

A. ultraviolet rays

B. gamma rays

C. radio waves

D. infrared waves

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4

If you want a sound proof room, the walls should be

A. able to refract the sound

B. good absorbers of sound

C. good reflectors of sound

D. All the above

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4

Out of the following which element has the longest half-life period?

A. Radium

B. Radon

C. Uranium-238

D. Plutonium

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4

The distance between two bodies is halved. Now the force of attraction between them will be

A. half

B. one fourth

C. four times

D. two times

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4

Separating particles from a suspension is effected by

A. centrifugal force

B. frictional force

C. gravitational force

D. distillation

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4

The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by

A. Irene Curie

B. W Bothe and H Becker

C. James Chadwick

D. Jean Joliot

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4

Echoes are produced by

A. the reflection of sound waves

B. the refraction of sound waves

C. the interference of sound waves

D. reverberation of sound waves

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Sound waves In 'air travel faster if

A. frequency is higher

B. wavelength is smaller

C. pitch is smaller

D. air is warmer

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A proton is

A. the ionised hydrogen molecule

B. the nucleus of helium atom

C. the nucleus of hydrogen atom

D. the positive counterpart of electron

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If an empty cylinder Is half ruled with a liquid, Its centre of gravity is

A. shifted upwards

B. shifted downwards

C. shifted neither upward nor downward

D. shifted upward or downward depending on the density of the liquid

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4

We see the sun before it actually rises on the horizon. This is due to

A. refraction

B. reflection

C. total internal reflection

D. parallax