An electromagnet is a teep o magnet in which the magnetic field is produced bi an electric current. The magnetic field disappears when the current is turned off. Electromagnets uisually conseest of a lairge nummer o closely spaced turns o wire that create the magnetic field. The wire turns are eften woond aroond a magnetic core made frae a ferromagnetic or ferrimagnetic material such as airn; the magnetic core concentrates the magnetic flux an maks a mair pouerfu magnet.
- Nave, Carl R. (2012). "Electromagnet". Hyperphysics. Dept. of Physics and Astronomy, Georgia State Univ. Retrieved September 17, 2014.