Question

Explain three ways of charge transfer.

Answer 1

Transfer of charges takes place in the following three ways:

1. Transfer by Friction
2. Transfer by Conduction
3. Transfer by Induction

• Transfer by Friction:
  This method of charging an uncharged body by rubbing it; against another body is called charging by friction.
  Example:
  While combing hair charges are transferred from the hair to comb due to friction.
• Transfer by conduction: charges can be transferred to an object by bringing it in contact with a charged body. This method of transferring charges from one body to another body is called transfer by conduction.
  Example:
  When the ebonite rod is rubbed with woollen cloth, electrons from the woollen cloth are transferred to the ebonite rod. Now ebonite rod will be negatively charged.

1. When it is brought near the paper cylinder, negative charges in the rod are attracted by the positive charges in the cylinder.

    

2. When the cylinder is touched by the rod, some negative charges are transferred to the paper. Hence, the negative charges in the rod are repelled by the negative charges in the cylinder.

• Transfer by Induction:
  The process of charging an uncharged body by bringing a charged body near to it but without touching it is called induction.
  Example:
  we can charge an uncharged object when we touch it by a charged object. But, it is also possible to obtain charges in a body without any contact with other charges.