we explain that a permanent magnet is made from a “hard” magnetic material that maintains its magnetism over long periods of time. The magnetism in an electromagnet is created by the current running through a coil of insulated wire that is wound around a piece of “soft” magnetic material. On the other hand, in an electromagnet, the magnetic field is created through electric current in a wire-wound coil and strengthened by a soft-iron core. As soon as you turn off the power, the soft-iron core loses its magnetization.
Differences Between Electromagnet and Permanent Magnet in Tabular Form:
|Electromagnet produces a magnetic field as long as the current flows through its coils.||A permanent magnet produces a permanent magnetic field.|
|An electromagnet can produce a very strong magnetic force.||A permanent magnet produces a comparatively weak force of attraction.|
|The magnetic field strength can be changed in an electromagnet.||The magnetic field strength cannot be changed in this type of magnet.|
|It can be easily demagnetized by switching off the current.||Permanent magnet cannot be easily demagnetized.|