Correct Answer - Option 2 : Change of temperature
Concept:
The movement of energy from one place to another is called energy transfer. Heat transfer mainly takes place due to temperature difference.
There are three modes of Heat transfer.
1.Conduction: The mode of heat transfer in solids where heat transfer takes place without the movement of medium particles is called conduction.
For example: By heating one end of a metal rod we can feel the heat at the other end.
2.Convection: The mode of heat transfer in fluids where heat transfer takes place due to the movement of particles of the medium is called convection.
For example: Heating of water in a pot
3. Radiation: The mode of heat transfer where heat is transferred from one place to another without affecting the medium particles is called radiation.
For example: Sun emits radiation in the form of light, heat.
