Physics MCQs for Class 9 with Answers
Metals are good conductor of heat dut to the:
Free electron
Big size of their molecule
Small size of their molecules
Rapid vibrations of their atoms
Larger number of slots are made in radiators to increase:
Surface temperature
Surface area
Both A and B
Nonr
Those objects which do not conduct electricity are called.
Insulator
Semi conductor
Nil
Conduct
Land and Sea breezes are the results of:
Conduction
Convection
Radiation
Conduction and radiation
A silvery white surface is a :
Worst reflector
Best reflector
Worst absorber
Best absorber
What happens to the thermal conductivity of a wall if its thickness is doubled?
Become double
Remain the same
Become half
Become one fourth
There are ways to transfer the heat from one place to another.
1
2
3
4
A Leslie cube is a:
Metal box
Wooden box
Glass box
None
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