Question # 1

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

Work done is maximum when angle between force and displacement is:

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0°

90°

180°

None of these

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Area under the force displacement graph gives

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Power

Work

Heat

Energy

The consumption of energy by a 60 W bulb in 2 minutes is:

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2 watt-hour

120 watt-hour

30 watt-hour

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 ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

In the force applied is parallel to the direction of motion, then work done is:

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Maximum

Minimum

Zero

None of these

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

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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Zero

10.2 J

100 J

980 J

Work is a always done on a body when

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A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B are correct

The work done on the body will be zero if:

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No force is applied on the body

Force is applied but no displacement

Angle between F(force) and d(displacement) is 90°

All of these are correct

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

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Positive work

Negative work

Zero work

Infinte work

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

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