PRINCIPLE ON WHICH HEAT TRANSFER WORKS (ALL PHASES)

Question

Accepted Answer

Heat transfer works on the principle of transferring thermal energy from a higher temperature object to a lower temperature object.

Heat transfer occurs through conduction, convection, and radiation.
Conduction is the transfer of heat through a material without any movement of the material itself.
Example: Touching a hot pan and feeling the heat transfer through the metal.
Convection is the transfer of heat through the movement of fluids (liquids or gases).
Example: Boiling water in a pot where heat is transferred through the movement of water molecules.
Radiation is the transfer of heat through electromagnetic waves.
Example: Feeling the warmth of the sun on your skin.
Heat transfer always occurs from a higher temperature object to a lower temperature object.
The rate of heat transfer depends on the temperature difference between the objects and the properties of the materials involved.

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