Magnets are materials that can exert a force on other materials without actually touching them. This force is called a magnetic field. A permanent magnet is an object made from a material that is naturally attracted to iron and other metals. The most common type of permanent magnet is the rare-earth magnet, which is made from alloys of rare-earth elements. Electromagnets are made by wrapping coils of wire around a piece of metal such as iron. When an electric current passes through the coils, it creates a magnetic field in the metal. Magnets have many uses in technology, including in electrical generators, motors, and loudspeakers. They are also used in medicine for MRI scanners and in industry for separating ferrous metals from other materials.
Magnets
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