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Energy conservation and Poynting's theorem in the homopolar generator

Author(s): Chyba, Christopher F; Hand, Kevin P; Thomas, Paul J

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Abstract: Most familiar applications of Poynting's theorem concern stationary circuits or circuit elements. Here, we apply Poynting's theorem to the homopolar generator, a conductor moving in a background magnetic field. We show that the electrical power produced by the homopolar generator equals the power lost from the deceleration of the rotating Faraday disk due to magnetic braking and review the way that magnetic braking arises within Poynting's theorem.
Publication Date: Jan-2015
Citation: Chyba, Christopher F, Hand, Kevin P, Thomas, Paul J. (2015). Energy conservation and Poynting's theorem in the homopolar generator. American Journal of Physics, 83 (1), 72 - 75. doi:10.1119/1.4895389
DOI: doi:10.1119/1.4895389
ISSN: 0002-9505
EISSN: 1943-2909
Pages: 72 - 75
Type of Material: Journal Article
Journal/Proceeding Title: American Journal of Physics
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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