Question # 1

When temperature of source and sink of a heat engine becomes equal then the entropy change will be.

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zero

Minimum

Maximum

Negative

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

The mass of an object is quantitative measure 0 its

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Momentum

Acceleration

Inertia

Energy

The unit of energy is same as that of

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Power

Work

Torque

Density

The number of spark plug needed in diesel engine is

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0

2

3

4

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

One mile is equal to

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1.625 km

1.609 km

1.325 km

1.850 km

The unit of solar light inversely is

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Watt

kW m-2

Watt m-2

1 m2

The numebr of significant figures in 0.809999 is

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2

3

5

6

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

The Unit of thermodynamic temperature is.

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C^o

F^o

K

None of these

the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

Apparent weight of a man is in upward accelerated lift will

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Increases

Decreases

Remain same

Increases then decrees

The periodic variations of sound between maximum and minimum loudness are called.

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Doppler's effect

reflection

Laplace correction

Beats

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

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