Question

The fastest mode of transfer of heat is:

• A. Radiation
• B. Conduction
• C. Convection
• D. All the above

Answer 1

The correct option is A

Radiation

Heat can be transferred from one place to other by any of the three possible ways:

1. Conduction
2. Convection
3. Radiation

In the first two processes, a medium is necessary for the heat transfer. Radiation, however, does not have this restriction. It is also the fastest mode of heat transfer, in which heat is transferred from one place to the other in the form of electromagnetic radiations. All the objects radiate energy continuously in the form of electromagnetic waves.