Physics MCQs for Class 9 with Answers
Land and Sea breezes are the results of:
Conduction
Convection
Radiation
Conduction and radiation
Flow of thermal energy from hot body cold body is called:
Specific heat
Latent heat
Transfer of heat
Heat capacity
Water is _________ conductor:
Best
Bad
Good
Poor
Glass and transparent polythene sheets allow radiations of wavelength to pass through them:
Long
Short
Medium
All
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
____________ is bad conductors of heat:
Copper
Water
Wire
Nil
Worst absorber of heat is:
Dull black surface
Coloured surface
Shinning silvered surface
White surface
The brids stretch out their wings and circle in the rising currents of hot air called
conduction
convection
radiation
thermals
False celling is done to
Lower the height of ceiling
Keep the roof clean
cool and room
Insulate the ceiling.
The process in which heat is transmitted form one body to another by the interaction of atoms and the movement of free electrons is known as
convection
radiation
conduction
both (a) and (b)
Continue Reading Go to Next Page
Leave a Reply