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Physics 9 Chapter 9 - Transfer of Heat - 9
1.
Water is a...........................?
a) Bad conductor
b) Best conductor
c) Metalloid
d) Bad insulator
2.
Which of the following are included in fluids?
a) Both b and c
b) Solids
c) Gases
d) Liquids
3.
Which of the following are poor conductors of heat?
a) Gases
b) Solids
c) Liquids
d) Both b and c
4.
By which process, heat is transferred through liquids?
a) Convection
b) Radiation
c) Conduction
d) Molecular collision
5.
By which process, heat is transferred through gases?
a) Molecular collision
b) Conduction
c) Radiation
d) Convection
6.
What is the process of transfer of heat by actual movement of molecules from hot place to a cold place called?
a) Conduction
b) Radiation
c) Convection
d) Molecular collision
7.
In gases, by which process heat is mainly transferred?
a) Conduction
b) Molecular collision
c) Radiation
d) Convection
8.
Convection of heat is the process of heat transfer due to the................?
a) Random motion of molecules
b) Upward movement of molecules
c) Downward movement of molecules
d) Free movement of molecules
9.
Gases .......................on heating?
a) Collapse
b) Expand
c) Become lighter
d) Become heavier
10.
How convection currents can be set up?
a) By electric heaters
b) By all of these
c) By coal heaters
d) By gas heaters
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