Question # 1

A silvery white surface is a :

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Worst reflector

Best reflector

Worst absorber

Best absorber

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be:

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Maximum

Minimum

Zero

None of the above

If the distance is doubled between two masses. The gravitational force will decrease:

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4 times

2 times

One forth

One third

In symbols, co-efficient of volume expansion is defined as

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β = ΔT/V∘ΔV

β = ΔV/ΔT

β = ΔV/V∘ΔT

β = ΔT/ΔV

1 hp is equal to :

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747 W

746 W

748 W

1000 W

Parallel forces are those whose:

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^{Times of action are parallel}

Points of action are different

More than one forces

All of the given option

The measure of an object tendency to rotate about same axis is :

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Force

Moment arm

Torque

None of these

If the velocity of moving body in circle is doubled, then its centripetal force is

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Double

Half

Four times

Remain

If the weight body is greater then tension then body will.

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Move upward

move downward

not move

None

S.I unit of gravitational field strength is:

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Nkg

Nkg^-1

Nkg^-2

Nkg^-3

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

Which of the follow material has large specific heat?

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Copper

Ice

Water

Mercury

Rocket works on principle of ______________

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Action Reaction

Law of inertia

Mass energy

Nil

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