The difference between electromagnets and magnets

When the electromagnet is electrified, it has the same properties as the magnet.







The difference between them is:




1, the pole of the electromagnet can be changed, which is determined by the positive and negative poles of the electric power and the winding direction of the coil. 2, the magnetism of the electromagnet can also be changed. When the power is switched on, there is magnetism and magnetism. When there is no electricity, there is no magnetism, and the magnet is magnetic in any case.




3, the magnitude of the magnetic force of the electromagnet can also be changed, which is related to the number of turns and the current intensity of the coil, but the magnetic force of the magnet can not be changed.