Question # 1

Work done is lowering the bucket into the well is:

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Zero

Positive

Negative

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

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

The space around the earth within it exerts a force of attraction on other bodies of known as:

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Nuclear field

Conservative field

Electric field

Gravitational field

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°

1 J = ________?

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10⁷erges

10^-7erges

10⁵erges

10^-5erges

Work done in lower and 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

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

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

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+5 X 10¹J

+5 X 10²J

+5 X 10³J

+5 X 10⁴J

The ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

If one newton force acts on a body and displaces the body through 1m work done on body is

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1 dyne

1 joule

1KJ

1 Watt

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

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

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

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Moon

Sun

Oceans

Water

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

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