Question

What is an electromagnet?​

Answer 1

electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off.

Answer 2

• An electromagnet is a magnet with a magnetic field created by an electric current.
• Wire coiled into a coil is used to create electromagnets. A current flowing through the wire produces a magnetic field that is focused in the hole, which marks the coil's centre.
• When you switch off the current, the magnetic field vanishes.
• The wire turns are frequently twisted around a magnetic core made of a ferromagnetic or ferrimagnetic material like iron, which concentrates the magnetic flux and produces a more powerful magnet.