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Abstract


Do We Really Understand Unipolar Induction?: A Comprehensive Theoretical and Experimental Study

Francisco J. M?ller
Year: 2010
A comprehensive revision of the Unipolar Inductor is presented. The study includes:
  1. its historical origins, (Faraday, 1832 to 1854)
  2. the competing theories advanced to explain its operation (fixed line theory; moving line theory; Lorentz's force; Maxwell's (Faraday) flux law; vector potential theory; and Amperian electrodynamic theories (Ampere, Gauss, Weber)
  3. the thorny problem of seat of emf localization and its proposed experimental resolution by the author
  4. the vexing problem formulated by Feynman (that Maxwell-Faraday's flux law is not applicable to the inductor)
  5. a description of the major experimental tests of unipolar induction, including Kennard's 1917 experiment, the author's own modification of Faraday's inductor and some recent experiments (Marinov, Guala-Valverde, etc)
  6. the most relevant applications: in engineering (homopolar generators; brushless generators, and claimed over-100% efficient generators ); in astrophysics (origin of planetary and cosmic magnetic fields); and most importantly
  7. the theoretical relevance concerning the applicability or non-applicability of Special and General Relativity theories to the unipolar inductor, both in rotational and translational forms.