Question # 1

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

Food rich in proteins is:

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potato

grapes

vegetables

bread

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Efficiency of a heat engine working between 27 ^oC and 32 ^oC will be.

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50%

90%

40%

62%

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

In case of planets centripetal force is provided by

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Coulomb's force

Electrostatic force

Gravitational force

Magnetic force

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

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