Question # 1

The SI unit of intensity of light is

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Joule

Mole

Candila

Kilomole

Supplementary units are.

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Three

Two

Five

One

Physics bases on Newtonian mechanics is called

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astrophysics

Modern Physics

Classical Physics

Meta Physcis

The diastolic pressure of a normal healthy person is.

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120 torr

110 torr

100 torr

75-80 torr

The efficiency of heat engine whose sink is at 17 ^oC and source at 200 ^oC is.

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38%

63%

80%

90%

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

Systematic erro occurs due to

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Instrument

Zero erro of the instrument

Botah a and b

None of these

The time rate of change of angular displacements called.

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Linear velocity

Linear speed

Angular velocity

Angular speed

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.

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25%

50%

70%

100%

Distance covered by a freely falling body is 2 seconds will be

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9.8 m

19.6 m

44.4 m

49 m

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

The amplitude of a vibrating body at resonance in vacuum is

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Minimum

Maximum

Zero

Infinite

For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

A force applied on a body produces acceleration in

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Opposite direction

perpendicular direction

Its own direction

In any direction

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

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