Physics 9 Unit 9 MCQs Tests

In this post, we have prepared 4 MCQs tests of Federal Board Physics 9 Unit 9 MCQs Tests. For more MCQs Tests visit our Online MCQs Test Page.

Physics 9 Unit 9 MCQs Tests

Practice MCQs Test No 1

130

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Class 9 Physics
Unit 9
Practice MCQs Test No 1

1 / 10

The land breeze blows from:

sea to land during the day

land to sea during night

sea to land during night

land to sea during the day

2 / 10

False ceiling is done to:

keep the roof clean

insulate the ceiling

lower the height of ceiling

cool the room

3 / 10

What happens to the thermal conductivity of a wall if its thickness is doubled?

becomes double

becomes half

remains the same

becomes one fourth

4 / 10

Rooms are heated using gas heaters by:

Conduction only

Convection and radiation

Radiation only

Convection only

5 / 10

Radiations are emitted by:

none is correct

cold bodies

hot bodies

all bodies

6 / 10

In solids, heat is transferred by:

conduction

convection

radiation

absorption

7 / 10

Metals are good conductors of heat due to the:

free electrons

rapid vibrations of their atoms

small size of their molecules

big size of their molecules

8 / 10

Which of the following is a good radiator of heat?

a dull black surface

a shining silvered surface

green coloured surface

a white surface

9 / 10

Convection of heat is the process of heat transfer due to the:

free movement of molecules

random motion of molecules

upward movement of molecules

downward movement of molecules

10 / 10

In gases, heat is mainly transferred by:

conduction

radiation

convection

molecular collision

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Practice MCQs Test No 2

80

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Class 9 Physics
Unit 9
Practice MCQs Test No 2

1 / 10

Ventilation in our houses is only possible due to:

Convection

All of above

Conduction

Radiation

2 / 10

Which of the following is best for insulation?

Brass

Glass

Fiber glass

Air

3 / 10

Geysers work on the principle of:

Convection

All of above

Radiation

Conduction

4 / 10

There are _________ methods of transmission of heat:

3

1

2

4

5 / 10

Transfer of heat by the actual movement of molecules:

Radiation

All of above

Conduction

Convection

6 / 10

Ice is a:

None

Perfect Conductor

Bad conductor

Good conductor

7 / 10

Transmission of heat from one body to another body by the interaction of atoms and electrons:

Radiation

All of above

Convection

Conduction

8 / 10

Transmission of heat by waves without affecting the medium on its way:

Conduction

Radiation

All of above

Convection

9 / 10

Water is a:

Good conductor

Super conductor

Insulator

Poor conductor

10 / 10

Heat from sun reaches us by:

Convection

Radiation

All of above

Conduction

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Practice MCQs Test No 3

68

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Class 9 Physics
Unit 9
Practice MCQs Test No 3

1 / 10

Land and sea breezes are due to:

Conduction

Radiation

Convection

All of them

2 / 10

Styrofoam is a _____ of heat.

None of these

Bad conductor

Good conductor

Semi conductor

3 / 10

Feathers of the birds are:

Semiconductor

Insulators

Conductor

None of these

4 / 10

Global warming in the world is due to:

Radiation

None of these

Land and sea breezes

Greenhouse effect

5 / 10

Which one is (are) the insulator (s)?

Cotton

Rubber

Cork

All of them

6 / 10

___________ in the Earth’s atmosphere causes the greenhouse effect.

Both Water vapors and Carbon dioxide

None of these

Water vapors

Carbon dioxide

7 / 10

Shinning silvered surfaces are __________ reflector.

Poor

Worst

Good

Best

8 / 10

Colored surfaces are ______ absorber.

Worst

Best

Good

Poor

9 / 10

Movement of water on heating is shown for the crystal of:

Sodium chloride

None of these

Potassium permanganate

Calcium carbonate

10 / 10

Black surfaces are _______ emitter:

Best

Good

Poor

Worst

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Full Chapter Challenge MCQs Test

132

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Class 9 Physics
Unit 9
Full Chapter MCQs Test

1 / 30

Transmission of heat by waves without affecting the medium on its way:

All of above

Conduction

Radiation

Convection

2 / 30

Which of the following is best for insulation?

Brass

Air

Fiber glass

Glass

3 / 30

___________ in the Earth’s atmosphere causes the greenhouse effect.

Carbon dioxide

Water vapors

Both Water vapors and Carbon dioxide

None of these

4 / 30

Radiations are emitted by:

cold bodies

all bodies

none is correct

hot bodies

5 / 30

Transmission of heat from one body to another body by the interaction of atoms and electrons:

Conduction

All of above

Convection

Radiation

6 / 30

Land and sea breezes are due to:

All of them

Radiation

Conduction

Convection

7 / 30

In gases, heat is mainly transferred by:

conduction

convection

radiation

molecular collision

8 / 30

Heat from sun reaches us by:

Convection

Radiation

All of above

Conduction

9 / 30

Black surfaces are _______ emitter:

Good

Poor

Worst

Best

10 / 30

Ice is a:

None

Good conductor

Perfect Conductor

Bad conductor

11 / 30

False ceiling is done to:

lower the height of ceiling

insulate the ceiling

cool the room

keep the roof clean

12 / 30

Colored surfaces are ______ absorber.

Poor

Worst

Best

Good

13 / 30

Feathers of the birds are:

Conductor

Semiconductor

None of these

Insulators

14 / 30

There are _________ methods of transmission of heat:

1

2

3

4

15 / 30

Ventilation in our houses is only possible due to:

Conduction

Convection

All of above

Radiation

16 / 30

Convection of heat is the process of heat transfer due to the:

random motion of molecules

free movement of molecules

downward movement of molecules

upward movement of molecules

17 / 30

Geysers work on the principle of:

Conduction

Convection

All of above

Radiation

18 / 30

Water is a:

Super conductor

Good conductor

Poor conductor

Insulator

19 / 30

Metals are good conductors of heat due to the:

big size of their molecules

small size of their molecules

free electrons

rapid vibrations of their atoms

20 / 30

Which of the following is a good radiator of heat?

a white surface

a shining silvered surface

green coloured surface

a dull black surface

21 / 30

Movement of water on heating is shown for the crystal of:

Sodium chloride

Calcium carbonate

Potassium permanganate

None of these

22 / 30

In solids, heat is transferred by:

convection

radiation

conduction

absorption

23 / 30

Which one is (are) the insulator (s)?

All of them

Cork

Rubber

Cotton

24 / 30

Styrofoam is a _____ of heat.

Semi conductor

Good conductor

Bad conductor

None of these

25 / 30

The land breeze blows from:

sea to land during the day

sea to land during night

land to sea during night

land to sea during the day

26 / 30

Rooms are heated using gas heaters by:

Conduction only

Radiation only

Convection and radiation

Convection only

27 / 30

Shinning silvered surfaces are __________ reflector.

Good

Best

Worst

Poor

28 / 30

Global warming in the world is due to:

None of these

Radiation

Greenhouse effect

Land and sea breezes

29 / 30

What happens to the thermal conductivity of a wall if its thickness is doubled?

becomes double

remains the same

becomes half

becomes one fourth

30 / 30

Transfer of heat by the actual movement of molecules:

Conduction

Convection

Radiation

All of above

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