Many objects around you contain electromagnets. They are found in electric motors and loudspeakers. Electric bells like the ones used in most schools also contain an electromagnet. The slideshow ...

A coil with an iron core is called an electromagnet. The iron core increases the coil’s magnetic field strength. A simple electromagnet is made by coiling wire around an iron nail. An iron core ...

Horseshoe-shaped electromagnet used by James Joule, c.1840. This electromagnet was used by the scientist James Joule for experiments about energy. Joule was a Salford resident and the son of a brewer.