Physics MCQs for Class 9 with Answers
The bad conductor of heat is:
Iron
Copper
Air
Aluminum
All are conductors except:
Copper
Wires
Steel
Wood
At night , the air from land to begins towards sea called:
Land breeze
Sea breaze
Both A and B
Radiation
Those objects that conduct electricity are:
Conductors
Insulators
Semi conductOrs
None of these
Thermal conductivities of Lead
23
30
35
85
The transfer of heat by vibrating molecules in solids :
Conduciton
Radiation
Convection
None
Rooms are heated using gas heaters by
Conduction only
Convection and radiation
Radiation only
Convection only
More radiation is reflected by the surface.
White
Coloured
Black
Rough
Land and Sea breezes are the results of:
Conduction
Convection
Radiation
Conduction and Radiation
Dull black surface is a best:
Emitter
Absorber
Reflector
None of these
Continue Reading Go to Next Page
Google Ads
Leave a Reply