This video shows how to test the direction of force when the current-carrying wire is above vs. below a compass. What does this tell us? [0:26]

Watch a video replicating how Hans Christian Orsted made a famous observation about electromagnetism in 1819. [0:40]

The video lesson is from Khan Academy's physics library. The discovery of the battery, along with its connection to electromagnetism, are discussed.

Investigate the relationship between the number of coils in an electromagnet and its strength. [1:09]

Apply current in both directions and notice that the response is different. [0:35]

Mr. Andersen contrasts nuclear reactions to chemical reactions. He explains the four main forces of nature; including gravity, electromagnetism, strong, and weak nuclear forces. He also explains how fusion differs from fission.

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....

Hans Christian Orsted made this famous observation in 1819 when he discovered electromagnetism.

Animated video explores the discovery of magnets.