Question # 1

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

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

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°

When velocity of moving body is doubled, the quantity which is also doubled is its:

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K.E.

Acceleration

Momentum

P.E.

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 tidal energy is produced due to rotation of Earth relative to:

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Moon

Sun

Oceans

Water

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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Zero

10.2 J

100 J

980 J

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

When force and displacement are perpendicular to each other than work is equal to

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Unity

Infinity

Zero

-Fd

Area under the force displacement graph gives

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Power

Work

Heat

Energy

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

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Direction

Force applied

Path followed by the body

Power

The angle between centripetal force and displacement of the body moving in a circle is:

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0°

90°

180°

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

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

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