Physics MCQs for Class 9 with Answers
Thermoflask is used maintain:
Heat
Temperature
Density
Pressure
More radiation is reflected by the surface:
White
Coloured
Black
Rough
Glass and transparent polythene sheets allow radiations of wavelength to pass through them:
Long
Short
Medium
All
The bad conductor of heat is:
Iron
Copper
Air
Aluminum
Birds are able to fly on ____________
Radiations
Thermals
Air
Layers
Conduction on heat occur at ________ rate in materials
Different
Same
Both A and B
None
The quantity of heat absorbed by the body depends upon:
Colour of surface
Nature of surface
Shape of surface
Both a & b
Wood, cork, cotton, wool, rubber are the eamples of:
Conductor
Thermal conductor
Insulator
both a & b
If heat Q flows in time ‘t’ through some metal then rate of flow of heat is defined as
Flow of heat = 2Qt
Flow of heat = Q/t
Flow of heat = t/Q
Flow of heat = Qt
Shining silvered surface is a best:
Emitter
Absorber
Reflector
None of these
Continue Reading Go to Next Page
Google Ads
Leave a Reply