Wiedemann Effect


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Wiedemann effect

[′vēd·ə‚män i‚fekt]
(electromagnetism)
The twist produced in a current-carrying wire when placed in a longitudinal magnetic field. Also known as circular magnetostriction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Wiedemann Effect

 

the twisting of a ferromagnetic rod through which an electric current is flowing when the rod is placed in a longitudinal magnetic field; it was discovered by the German physicist G. Wiedemann in 1858. The Wiedemann effect is one of the manifestations of magnetostriction in a field formed by the combination of a longitudinal magnetic field and a circular magnetic field that is created by an electric current. If the electric current (or the magnetic field) is alternating, the rod will begin torsional oscillation. The Wiedemann effect is mainly of historical interest.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.