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Physics 9th Class English Medium Unit 6 Online Test MCQs With Answers

Question # 1

Einstein's mass-energy equation relation is:

Choose an answer

E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

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Question # 2

If the force of 25 N pulls a stone through a distance of 5 cm in its direction the magnitude of work will be:

Choose an answer

5 J

125 J

175 J

200 J

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Question # 3

The S.I unit of power is:

Choose an answer

Newton

Watt

Joule

Coulomb

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Question # 4

If a person is not moving when he lifts a load on his head work is:

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FS Cos𝜽

FS Sin𝜽

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Question # 5

What kind of waste is produced by nuclear power plant?

Choose an answer

Carbon di oxide

Radio active

Fuels

Toxic material

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Question # 6

One liter is equal to:

Choose an answer

1 kgcm-3

1000 cm-3

10-6 m3

10-3 m3

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Question # 7

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

Choose an answer

45°

0°

60°

90°

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Question # 8

The energy stored in coal is

Choose an answer

Heat Energy

Kinetic energy

Chemical energy

Nuclear energy

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Question # 9

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

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Question # 10

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

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Question # 11

The work done in lifting a brick of mass 2 kg through a height of 5 m above ground will be:

Choose an answer

2.5 J

10 J

50 J

100 J

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Question # 12

Energy cannot be destroyed however it can be converted into some other forms. This is known as:

Choose an answer

Law of heat exchange

Law of conservation of energy

Law of conservation of momentum

None of these

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Question # 13

The ratio of output to input is called:

Choose an answer

work

Efficiency

Force

All of above

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