Question # 1

Rate of doing work is called:

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Energy

Torque

Power

Moment

The product of force and displacement is called;

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Work

Efficiency

Power

Energy

Larger is the area greater will be:

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Radiation

Transfer of heat

Evaporation

Conduction of heat

Tensile strain produces the change in the object.

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Length

Volume

Area

Density

1 Newton =_________

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1 kg ms^-2

1 kg ms

1 kg m^-1s^-2

1 kg^-1m^-1 s^-1

The temperature at which a solid start melting is:

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Freezing point

Melting point

Fusion point

Both B and C

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

According to law of conservation of energy increases K.E is equal to:

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Increase P.E

Decrease P.E

Decrease K.E

None of these

The unit of gravitational constnat is:

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Nm² kg

Nm²kg^-2

Nm²kg^-1

N - m²

1 meter cube is equal to:

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1 liters

10 liters

1000liters

100liters

In falling object potential energy is covered to:

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K.E

Force

P.E

Nil

Bimetallic strip works on the principle of

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expansion of metals

contraction of metals

both (A) and (B)

unequal expansion of metals

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