Question

What do you mean by transfer of heat? Explain the process of transfer of heat in solids. [3 marks]

Answer 1

Flow of heat from one object to another is called transfer of heat. Heat always flows from a body at higher temperature to another body at lower temperature. In other words, heat always flows from a hotter body to a colder body. In this process, the temperature of the hot body falls as it releases heat which is received by the colder body or the body having lower temperature. Thus the temperature of the colder body or less hotter body rises. The flow of heat stops when temperature of both the bodies becomes equal.
Transfer of heat takes place through conduction, convection and radiation. [2 Marks]

Conduction is the process of transfer of heat from one particle to the next particle in a solid without the particles actually moving from their position.
[1 Mark]