This article has been reviewed by the following Topic Editor: Peter Saundry
Hans Oersted (1777-1851), a Danish physicist and chemist who, in 1819, discovered the deflection of a magnetic compass needle while performing a demonstration for his students. The discovery that a magnetic needle is deflected at right angles to a conductor carrying an electric current established a relationship between magnetism and electricity and initiated the study of electromagnetism.
Cutler J. Cleveland (Lead Author);Peter Saundry (Topic Editor) "Oersted, Hans". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 18, 2006; Last revised Date August 18, 2006; Retrieved May 23, 2013 <http://www.eoearth.org/article/Oersted,_Hans>