Physics MCQs for Class 9 with Answers
__________ is a major source of heat:
Mercury
Sun
Fire
Moon
The main source of energy n the universe is:
Moon
Stars
Sun
Planets
In solid, heat is transferred by:
Radiation
Conduction
Convection
Absorption
There are ______ modes of transfer of heat:
1
2
3
4
False ceiling is done to
Lower the height of ceiling
Keep the roof clean
Cool the room
Insulate the ceiling
The temperature of a black dull surface on heating :
Rise Rapidly
Fall Rapidly
Becomes zero
Remain constant
The radiation from sun is:
Alpha
Gamma
Radio
Ultraviolet
All bodies absorb or emit energy by
convection
radiation
conduction
both (a) & (c)
Transfer of heat by the actual movement of molecules from one place to the other is called 
conduction
convection
radiation
waves
What of the following is a god radiator of heat?
a Shinning silvered surface
a dull black surface
a white black surface
a shinning colored surface
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