Question # 1

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

The work done in moving a body between two points in a conservative field is independent of the

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Direction

Force applied

Path followed by the body

Power

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

The work done by a force keeping an object in circular motion with constant speed is:

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Zero J.

0.1 J

1 J

0.01 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

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

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

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

If one newton force acts on a body and displaces the body through 1m work done on body is

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1 dyne

1 joule

1KJ

1 Watt

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

Work has a dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

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

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

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