Khan Academy
Khan Academy: Electromagnet: Electromagnetic Field (Loop)
A demonstration of the simplest electric motor showing current being applied to a single loop of wire. This is the principal observation leading to all electric motors. Based on actual observations from 1819 by Hans Christian Oersted....
Khan Academy
Khan Academy: Electromagnet: Discovery of Electromagnetism
Hans Christian Orsted made this famous observation in 1819 when he discovered electromagnetism.