Magnetism was first discovered in the ancient world when people noticed that lodestones, naturally magnetized pieces of the mineral magnetite, could attract iron. The word magnet … See more

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets … See more

In vacuum,
$${\displaystyle \mathbf {B} \ =\ \mu _{0}\mathbf {H} ,}$$
where μ0 is the vacuum permeability.
In a material,
The quantity μ0M is … See more

Magnetism, at its root, arises from three sources:
1. Electric current
2. Spin magnetic moments of elementary particles See more

Diamagnetism
Diamagnetism appears in all materials and is the tendency of a material to oppose an applied magnetic field, and therefore, to be repelled by a magnetic field. However, in a material with paramagnetic properties (that is, with a tendency … See more

As a consequence of Einstein's theory of special relativity, electricity and magnetism are fundamentally interlinked. Both magnetism lacking electricity, and electricity without … See more

The phenomenon of magnetism is "mediated" by the magnetic field. An electric current or magnetic dipole creates a magnetic field, and that field, in turn, imparts magnetic forces on other particles that are in the fields.
Maxwell's … See more