Question # 1

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

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

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

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

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

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

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60°

90°

30°

0°

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

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

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

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Nuclear field

Conservative field

Electric field

Gravitational field

The value of escape velocity of Earth planet comes out to be:

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11 m/sec

11 km/sec

11 km/hour

11 cm/sec

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

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

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

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