Question # 1

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

One Megawatt is equal to :

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1 × 106 w

1 × 102 kw

1015 w

Nil

If mass of body is 10 kg travelling with speed of light, how much energy is generated?

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E = 9 × 1017 J

E = 9 × 1015 J

E = 9 × 1018 J

E = 9 × 1016 J

If a force F makes an angle θ with the direction of motion of the force, then the formula for the work done will be:

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W = FS

W = FS cosθ

W = FS sinθ

W = FS tanθ

When a body is lifted through a height the work done on its appears in the form of its:

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Kinetic energy

Potential energy

Elastic potential energy

Geothermal energy

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

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45°

0°

60°

90°

The ratio of output to input is called:

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work

Efficiency

Force

All of above

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

The product of force and distance is :

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Force

Work

Torque

Nil

Einstein mass energy equation is:

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E= mc²

E= m²c

E = 1/2 mc²

2 mc²

Which one of the following converts light energy into electrical energy?

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Electric bulb

Electric generator

Photo cell

Electric cell

According to law of conservation of energy increases K.E is equal to:

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Increase P.E

Decrease P.E

Decrease K.E

None of these

if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by

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K.E. = 1/2 mv

K.E. = 1/2 mv2

K.E. = mv2

K.E. = 1/2 m2v

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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers

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