Question

The fastest method of heat transfer from a hot body to a cold body is

• A. conduction
• B. convection
• C. radiation
• D. none

Answer 1

The correct option is A

conduction

Explanation for correct option:-

(A) Conduction is the process of heat transfer from the hotter end to the colder end of a solid without any actual movement of molecules of solid.The molecules of a substance which come in contact with heat possess more energy collide with neighbouring molecule and transfer energy.

Explanation for incorrect option:-

(B) Convection is that method of heat transfer in which medium particles actually move to the heat source,receive heat and move away from it.

(C) Radiation is the process of heat transfer from a hot body to a cold body directly without heating the space between them.