Question # 1

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

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

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

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

When the body is 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

Work done is independent of path followed in _______

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Gravitational field

Magnetic field

Electric field

All of these

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 a

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Scalar quantity

Vector quantity

Base quantity

None of these

Work done in lower and bucket into the well is:

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Zero

Positive

Negative

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

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0°

90°

180°

None of these

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

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 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

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 commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

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

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