The expansion of solids on heating and contraction on cooling is called
Thermal expansion
Normal expansion
Elastic expansion
elongation
The hot and cold region on the earth surface give rise to the large convection currents in the sea which are called as
Land breeze
Ocean currents
Sea breeze
None of these
Solid can expands in how many ways ?
2
4
1
3
What will happens when a cold body kept in contact with a hot body ?
Internal energy of cold body increases
heat flows from cold body to hot body
internal energy of cold body decreases
internal energy of hot body increases
The unit of coefficient of linear expansion is
m
moc-1
oc
oc-1
A good insulator of heat is
Cu
Mercury
Trapped air
Iron
The process of transfer of heat from a hot end to the cold end from particle to particle of the medium is
convection
radiation
conduction
both 1 and 3
Which of the following gas is not a green house gas?
CO2
Methane
CFC
Oxygen
Heat radiations travel with a speed
less than the speed of light
equal to speed of light
greater than speed of light
equal to speed of sound
Linear expansion of solid will not depend on
material of the rod
mass of the rod
original length of the rod
increase in temperature
