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In the literature of Electromagnetism, the electromotive force of a "circuit" is often defined as work done on a unit charge during a complete tour of the latter around the circuit. We explain why this statement cannot be generally regarded as true, although it is indeed true in certain simple cases. Several examples are used to illustrate these points.
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C. J. Papachristou, A. N. Magoulas, Electromotive force: A guide for the perplexed, Annals Nav. Acad., http://arxiv.org/abs/1211.6463.
Gr. (Nausivios Chora) Vol. 5 (2014), in press. See also: http://arxiv.org/abs/1211.6463.
D. J. Griffiths, Introduction to Electrodynamics, 3rd Edition (Prentice-Hall, 1999).
W. N. Cottingham, D. A. Greenwood, Electricity and Magnetism (Cambridge, 1991).
D. M. Cook, The Theory of the Electromagnetic Field (Dover, 2003).
R. K. Wangsness, Electromagnetic Fields, 2nd Edition (Wiley, 1986).
J. D. Jackson, Classical Electrodynamics, 2nd Edition (Wiley, 1975).
W. K. H. Panofsky, M. Phillips, Classical Electricity and Magnetism, 2nd Edition (Addison-Wesley, 1962).
E. P. Mosca, Magnetic forces doing work?, Am. J. Phys. 42 (1974) 295.
J. A. Redinz, Forces and work on a wire in a magnetic field, Am. J. Phys. 79 (2011) 774.
R. A. Diaz, W. J. Herrera, S. Gomez, The role of the virtual work in Faraday's Law, http://arxiv.org/abs/1104.1718.