Physics MCQs for Class 9 with Answers
On heating Air become:
Heavier
Lighter
Remain same
None of these
The bad conductor of Heat is:
Iron
Copper
Air
Aluminium
The quantity of heat absorbed by the body depends upon:
Colour of surface
Nature of surface
Shape of surface
Both a and b
Rooms are heated using gas heater by:
Conduction only
Convection and radiation
Radiation only
Convection only
Land breeze blows from:
Sea to land drawing night
Sea to land during day
Land to sea during night
Land to sea during day
Land and Sea breezes are the results of:
Conduction
Convection
Radiation
Conduction and Radiation
Which of the following is an insulator?
Wood
Glass
Plastic
Steel
False celling is done to
Lower the height of ceiling
Keep the roof clean
cool and room
Insulate the ceiling.
Dull black surface is a best:
Emitter
Absorber
Reflector
None of these
In gases, heat is mainly transferred by
Molecular collision
Conduction
Convection
Radiation
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