Physics MCQs for Class 9 with Answers
On heating Air become:
Heavier
Lighter
Remain same
None of these
In thermo flask radiation is stopped by using :
Green color
Transparent
Silver color
Nil
On heating Air becomes.
Heavier
Lighter
Remain same
None
Feathers of bird give good thermal:
Conduction
Insulation
Convection
None of these
In atoms and molecules are packed closely together:
Solids
Gas
Liquid
Plasma
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
Degree of hotness or coldness of the body is called:
Heat capacity
Thermal conductivity
Heat
Temperture
The amount of heat absorb by body depends on the :
Colour of the surface
Nature of surface
Texture of surface
Both A and B
Amount of heat that flows in unit time is called:
Rate of flow of heat
Q/t
Conductivity
Both A and B
Thermos flask, is used to maintain:
Heat
Temperature
Density
Pressure
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