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Online Tests
9th Class Physics Chapter 9 Transfer of Heat English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
What happens to the thermal conductivity of a wall if its thickness is doubled?
Choose an answer
Become double
Remain the same
Become half
Become one fourth
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Question # 2
The example of bad conductor is:
Choose an answer
Wool
Copper
Gold
Iron
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Question # 3
Thermal conductivities of Lead
Choose an answer
23
30
35
85
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Question # 4
Land breeze blows from:
Choose an answer
Sea to land drawing night
Sea to land during day
Land to sea during night
Land to sea during day
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Question # 5
Leslie's cube is filled with
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Cold water
Hot water
Mercury
Air
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Question # 6
Metals are good conductor of heat dut to the:
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Free electron
Big size of their molecule
Small size of their molecules
Rapid vibrations of their atoms
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Question # 7
In building central heating system works on the process of:
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Covection
Radiation
Conduction
both a and b
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Question # 8
Light from the sun contain thermal radiation of:
Choose an answer
Long wavelength
Short wavelength
Ultra violet rays
Visible light
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Question # 9
The transfer of heat by vibrating molecules in solids :
Choose an answer
Conduciton
Radiation
Convection
None
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Question # 10
Convention is done by ____________
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Vibration of atoms
Actual movement of particles
Same as conduction
Nil
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Question # 11
Larger is the area greater will be:
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Radiation
Transfer of heat
Evaporation
Conduction of heat
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Question # 12
In which hot liquid can remains hot:
Choose an answer
Glass
Lead
Thermos
Hot pot
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Question # 13
Land and sea breezes are the result of:
Choose an answer
Absorption
Radiation
Conduction
Convection
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