Question # 1

Work has a dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

Work done is lowering the bucket into the well is:

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Zero

Positive

Negative

None of these

A solar cell is made from:

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Iron

Silicon

Germanium

Copper

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°

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

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

Work is a Quantity

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Vector

Scalar

Non-physical

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

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

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

Which of the following is not a unit of power:

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J-sec

Watt

N m/sec

Horsepower

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

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

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

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

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

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