Question # 1

What type of conversion is done candle burning?

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Chemical __ ;light

Chemical __ heat

Both a & b

None of above

_____________ is an other unit of power.

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J

W

hp

W/J

Above of mass 50 kg is raised to a height of 3m. what is its P.E

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500 J

1000 J

1500 J

2000 J

Kinetic energy is possessed by a body by:

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Virtue of motion

Height

Rest

Nil

The S.I unit of power is :

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j/s2

J

W

J/M2

The work done will be zero when the angle between the force and the displacement is:

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45°

60°

90°

180°

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

If velocity of a body becomes half that its energy K.E will be decrease to:

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Zero

Half

Double

4 Times

If a body does work at the rate of 1 Js^-1then its power will be:

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KW

1 MW

1 W

None of these

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be

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Maximum

Minimum

Zero

None of these

The source of energy that can be renewed are called:

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Renewable source

Non-renewable

They RAE Naturally found

None

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

The ratio of useful output to input energy is called:

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Power

Energy

Efficiency

Horse power

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