Describe the method of charging a conductor by induction.

Suppose we want to charge a metal rod A negatively, proceed as follows:

1. Place the rod A on insulating stand.
2. Take a positively charged glass rod B provided with an insulating handle.
3. Bring it near the rod A.
4. The near end P of the metal rod A will acquire negative charge while the far end Q acquires positive charge as shown in below figure.
5. Now touch the end Q of rod A by hand. Then remove hand and glass rod B simultaneously.
6. The rod A becomes negatively charged.