Historically, the iron ore magnetite, or lodestone, which is found in various parts of the world, especially in Magnesia, Greece, was known over 2000 years ago to swing around if suspended on a string.
KeywordsMagnetic Field Field Line Radio Wave Lorentz Force Eddy Current
Making a motor (WMV 15755 kb)
MHD demonstration (MPEG 18086 kb)
Falling magnet (MPEG 11440 kb)