How does an electromagnet differ from a permanent magnet? b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

1. An electromagnet is different from a permanent magnet because electromagnet can produce the magnetic field as long as the current is flowing through it while a permanent magnet doesn’t require electric current for the production of magnetic field.

Electromagnets are electric bells and electric motors. Permanent magnets are toys and refrigerator doors.