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Online Tests
Physics 9th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
A silvery white surface is a :
Choose an answer
Worst reflector
Best reflector
Worst absorber
Best absorber
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Question # 2
Glass and transparent polythene sheets allow radiations of wavelength to pass through them:
Choose an answer
Long
Short
Medium
All
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Question # 3
Dull black surface is a best:
Choose an answer
Emitter
Absorber
Reflector
None of these
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Question # 4
In houses, good thermal insulation means _____________ consumption of fuel:
Choose an answer
Lower
Higher
Normal
None
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Question # 5
Convention is done by ____________
Choose an answer
Vibration of atoms
Actual movement of particles
Same as conduction
Nil
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Question # 6
Amount of heat that flows in unit time is called:
Choose an answer
Rate of flow of heat
Q/t
Conductivity
Both A and B
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Question # 7
The example of bad conductor is:
Choose an answer
Wool
Copper
Gold
Iron
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Question # 8
The bad conductor of Heat is:
Choose an answer
Iron
Copper
Air
Aluminium
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Question # 9
The quantity of heat absorbed by the body depends upon:
Choose an answer
Colour of surface
Nature of surface
Shape of surface
Both a & b
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Question # 10
Convection of heat is a process of heat transfer due to;
Choose an answer
Random motion of molecules
Downward motion of molecules
Upward motion of molecules
Free motion of molecules
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Question # 11
All bodies absorb or emit energy by
Choose an answer
convection
radiation
conduction
both (a) & (c)
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Question # 12
Leslie cube have faces:
Choose an answer
2
3
4
5
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Question # 13
What gas behaves as glass or polythene to radiation:
Choose an answer
Nitrogen
Hydrogen
Carbon di oxide
Methane
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