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Physics 9th Class English Medium Online Test MCQs With Answers

Question # 1

The unit of density is:

Choose an answer

kg^-1 m^-3

kg m^-1

kgm^-3

kgm^-2

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Question # 2

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

Choose an answer

45°

0°

60°

90°

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Question # 3

All bodies absorb or emit energy by

Choose an answer

convection

radiation

conduction

both (a) & (c)

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Question # 4

The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:

Choose an answer

5 ms^-1

12.5 ms^-1

25 ms^-1

50 ms^-1

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Question # 5

Mass of earth is approximately _________

Choose an answer

3.7 x 10²⁴ kg

25.94 kg

6.0 x 10²²kg

6 x 10²⁴kg

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Question # 6

Weight of the body when we increase its height from earth's surface.

Choose an answer

Increase

Decrease

Remain constant

None

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Question # 7

If the force of 25 N is acting along the string to balance the weight then tension in string is

Choose an answer

25 N

50 N

Zero

None

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Question # 8

Rooms are heated using gas heaters by

Choose an answer

Conduction only

Convection and radiation

Radiation only

Convection only

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Question # 9

The altitude of geostationary orbits in which communication satellites are launched above the surface of the Earth is

Choose an answer

850 km

1000 km

6400 km

42,300 km

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Question # 10

The bad conductor of heat is:

Choose an answer

Iron

Copper

Air

Aluminum

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Question # 11

The mathematical form of law of gravitation is:

Choose an answer

F = GMe m/Re2

F = Gm1m2/r2

F = GMem1/Re2r2

None

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Question # 12

Which parameter remain same every where?

Choose an answer

Force

Mass

Weight

Velocity

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Question # 13

If the velocity of body decreases with time then acceleration will be.

Choose an answer

Positive

Negative

Variable

Uniform

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