Question # 1

Escape velocity from surface of Moon as compared to that from Earth surface is:

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Greater

Smaller

Equal

None of thes

A field in which the work done in moving a body along closed path is zero is called

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Nuclear Field

Conservative field

Gravitational field

Non-conservative field

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

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Zero

10.2 J

100 J

980 J

Teh consumption of energy by a 1000 watt heater in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

Work has a dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

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Power

Work

Pressure

None of these

Work done is lowering the bucket into the well is:

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Zero

Positive

Negative

None of these

The tidal energy is produced due to rotation of Earth relative to:

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Moon

Sun

Oceans

Water

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinite work

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ECAT Pre General Science Physics Chapter 4 Work and Energy Online Test MCQs With Answers

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