Question

State two advantages of an electromagnet as compared to a permanentvmagnet

Answer 1

•electromagnet can be switched on or off according to ones need whereas permanent magnets cannot be done so.

•the strength of an electromagnet can be increased or decreased according to the needs of the user by increasing the no. of turns of the wire. but in permanent magnets thus cannot be done.

hope it helps u.....

Answer 2

An electromagnet is a temporary magnet while a permanent magnet is permanent.

Polarity can be changed in an electromagnet while this is not possible in a permanent magnet.

The strength of the magnet can be changed in an electromagnet while the strength cannot be changed of a permanent magnet.