Question # 1

Work done is maximum when angle between force and displacement is:

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0°

90°

180°

None of these

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

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 and B is correct

Both A and B is correct

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

Work is a scalar product of

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Force, Velocity

Velocity, Displacement

Force, Displacement

Force, Momentum

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

None of these

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

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Moon

Sun

Oceans

Water

The work done by a force, keeping an object in circular motion with constant speed is:

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Zero J

1 J

0.1 J

0.01 J

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

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Conservative field

Non-conservative field

Electric field

None of these

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

The value of escape velocity of Earth planet comes out to be:

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11 m/sec

11 km/sec

11 km/hour

11 cm/sec

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

In the force applied is parallel to the direction of motion, then work done is:

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Maximum

Minimum

Zero

None of these

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

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