Railway tracks are made up of
Cobalt
Nickel
Chromium
Steel
From the following which one is correct in the case of thermal expansion in solids ?
On heating the length of the wire decreases
On cooling the metallic bar contracts
On heating the diameter of the solid metallic bar contracts
On cooling the length of the wire increases
From the following quantity which one is measured using the principle of calorimetry ?
Temperature
work
force
Heat
Temperature of the human body is 98.4oF. The corresponding temperature on Celsius scale
38.3
36.9
40
50
Hopes apparatus is used to demonstrate which of the following ?
coefficient of thermal expansion
coefficient of real expansion
anomalous expansion of benzene
anomalous expansion of water
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
In convection, heat is transferred
upwards
downwards
side ways
in all direction
The energy which flows from the hot body to the cold body is called
Mechanical energy
heat energy
electrical energy
Potential energy
In mercury heat is transferred mainly by
Conduction
Convection
Radiation
None of these
What is the SI unit of heat?
erg
Joule
Kelvin
Celsius
