Question # 1

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

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Zero

10.2 J

100 J

980 J

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

None of these

Work is 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 is correct

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Work-energy principle states that work done on the body by applied force is equal to change in:

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Potential energy

Kinetic nergy

Linear momentum

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°

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

The field in which work done is moving body between two points depends upon the path followed is called:

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Conservative filed

Non-conservative field

Electric field

None of these

SI Unit of work is

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Nm^-1

Joule

Nms

Both a and b

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

1 J = ________?

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10⁷erges

10^-7erges

10⁵erges

10^-5erges

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

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

A solar cell is made from:

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Iron

Silicon

Germanium

Copper

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

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