Physics MCQs for Class 9 with Answers
Feathers of bird give good thermal:
Conduction
Insulation
Convection
None of these
Heat radiation obey the laws of:
Absorption
Reflection
Both A and B
None
Transfer of heat by actual movement of molecules form hot place to cold place is called:
Conduction
Convection
Radiation
None
Transfer of heat by the actual movement of molecules from one place to the other is called 
conduction
convection
radiation
waves
Leslie cube have faces:
2
3
4
5
Which surface is bad emitter:
White surface
Black surface
Coloured surface
Silver surface
The quantity of heat absorbed by the body depends upon:
Colour of surface
Nature of surface
Shape of surface
Both a & b
Metals are good conductor of heat due to
Free Electrons
Big size of their molecules
Small size of their molecules
Rapid vibrations of their atoms
Both metals and non-metals transfer:
Electricity
Heat
Both A and B
None of these
The device used to stop conduction, convention and radiation:
Thermometer
Thermo flask
Both
Nil
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