Question # 1

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

The ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

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

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Nuclear filed

Conservative field

Gravitational field

Non-conservative field

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

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

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Much more

Very small

No amount at all

None of these

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

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

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:

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0°

30°

60°

90°

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

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

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