Question # 1

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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0.5 J

2 J

0.25 J

1 J

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

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60°

90°

30°

0°

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

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

None of these

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

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

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Positive

Negative

Zero

None of these

The space around the earth within which it expects a force of attraction on other bodies is known as:

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Nuclear field

Conservative field

Electric field

Gravitational field

Work is a Quantity

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Vector

Scalar

Non-physical

None of these

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

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°

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

Area under the force displacement graph gives

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Power

Work

Heat

Energy

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

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

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