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Physics 9 Chapter 9 - Transfer of Heat - 8
1.
Metals are good conductor of heat due to the..................?
a) Big size of their molecules
b) Free electrons
c) Rapid vibrations of their atoms
d) Small size of their molecules
2.
Which of the following is used for making handle of hot plates?
a) Copper
b) Conductors
c) Aluminium
d) Insulators
3.
Which of the following is used for making spoons?
a) Insulators
b) Copper
c) Aluminium
d) Conductors
4.
Why false ceiling is done?
a) Insulate the ceiling
b) Lower the height of ceiling
c) Cool the room
d) Keep the roof clean
5.
Which out of the following is a bad conductor?
a) Copper
b) Wool
c) Iron
d) Aluminium
6.
Which out of the following is a bad conductor?
a) Fur
b) Aluminium
c) Iron
d) Copper
7.
Which out of the following is a bad conductor?
a) Aluminium
b) Feathers
c) Copper
d) Iron
8.
Which out of the following is a bad conductor?
a) Aluminium
b) Iron
c) Polystyrenes
d) Copper
9.
Which out of the following is a bad conductor?
a) Aluminium
b) Copper
c) Fibre glass
d) Iron
10.
What is air?
a) Best insulator
b) Bad insulator
c) Both b and c
d) Bad conductor
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