Conduction

We have used a frying pan.

Frying pan has a grab holder to take out the pan from the flame. The holder is made of silicon or wood.

When we take the frying pan from the flame by holding the pan with pan holder, we do not feel hot.

If we touch the pan anywhere other than the grab holder, we feel hot.

When we touch the pan on the flame in the metallic area, we feel hot and when it is touched at the wooden or silicon part, we do not.

This is due to the fact that the metals conduct heat while silicon or wood does not.

The materials which are conductive in nature allow the heat to transfer through them.

Thus, if one end or a portion of the metallic body comes in the contact of the heat source, through the process of conduction, the whole body becomes heated.

Let's learn the process of conduction.

The process of heat transfer in solids is called conduction.

When one end of the conducting body is brought in contact with the heat source, the whole body becomes heated.

The process of conduction takes place by the free electron transfer and the molecular vibration in the conductor.

As the heat is transferred to the conducting body, the molecules of the material start vibrating.

The materials which conduct heat (as steel, silver etc.) are known as conductors.

The materials which are bad conductors of heat (as plastic, wood, silicon) are known as insulators.

Revision

Conduction is the process of heat transfer, it generally occurs in solids.

The conduction takes place through the free electron transfer and molecular vibration.

The materials which allow the heat to pass through them are called conductors.

The materials which do not allow the heat to pass through them are called insulators.

The end