What Are Electromagnets?

An electromagnet refers to a type of magnet where the magnetic field is created by an AC, DC, or pulsed electric coil. The magnetic field ceases once the current in the coil is removed, unlike permanent magnets, where magnetic fields remain. Electromagnets are used in a variety of applications, including electromechanical relays, satellites, radiation therapy, and particle accelerators.

The strength of an electromagnet can be increased by winding the coil of wire around a core of material that is highly magnetic. The strength of the magnet can also be increased by adding more turns to the coils. The magnetic fields produced by an electromagnet can be oriented in any direction depending on the application.