Physics MCQs for Class 9 with Answers
Wood, cork, cotton, wool, rubber are the eamples of:
Conductor
Thermal conductor
Insulator
both a & b
Leslie’s cube is a bod of
Metal
None Metal
wood
Metalloids
Birds are able to fly on ____________
Radiations
Thermals
Air
Layers
The quantity of heat absorbed by the body depends upon:
Colour of surface
Nature of surface
Shape of surface
Both a and b
In gases, heat in mainly transferred by:
Molecular collision
Conduction
Convection
Radiaiton
On hot days cold air from sea began to move towards land:
Sea breeze
Land breeze
Both A and B
None of these
Room are heated using gas heaters by:
Conduction only
Convection and radiation
Radiation only
Convection only
Good conductor is :
Air
Wood
Iron
None
Which gas behaves as glass or polythene to radiation:
Nitrogen
Hydrogen
Carbon di oxide
Methane
There are ______ modes of transfer of heat:
1
2
3
4
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