Physics MCQs for Class 9 with Answers
Dull black surface are good ____________
Absorber
Radiator
Conductor
None of these
The example of bad conductor is:
Wool
Copper
Gold
Iron
In atoms and molecules are packed closely together:
Solids
Gas
Liquid
Plasma
Heat radiation obey the laws of:
Absorption
Reflection
Both A and B
None
Which one is a good conductor?
cotton
air
wool
iron
Leslie’s cube is a bod of
Metal
None Metal
wood
Metalloids
How does heat reaches form sun to earth through?
Conduciton
Convection
Radiation
None
Anything kept in thermos :
In temperature remain constant
Its temperature decrease
Its temperature increase
None of these
The amount of heat absorb by body depends on the :
Colour of the surface
Nature of surface
Texture of surface
Both A and B
Convection of heat is a process of heat transfer due to;
Random motion of molecules
Downward motion of molecules
Upward motion of molecules
Free motion of molecules
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