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 |
Permanent magnet |
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. |