Question

explain electric method of
demagnetisation​

Answer 1

Answer:

Electrical Method using an Alternative Current (a.c)

Connect the solenoid to an alternating current (a.c) supply. Place the magnet inside the solenoid. Switch on a.c supply.  Slowly withdraw the magnet in East-West direction until it is some distance away from the solenoid while a.c. current still on.

Answer 2

Answer:

Electrical Method using an Alternative Current (a.c)

Connect the solenoid to an alternating current (a.c) supply. Place the magnet inside the solenoid. Switch on a.c supply.  Slowly withdraw the magnet in East-West direction until it is some distance away from the solenoid while a.c. current still on.