A changing magnetic field always produces an electric field, and conversely, a changing electric field always produces a magnetic field. This interaction of electric and magnetic forces gives rise to a condition in space known as an electromagnetic field. The characteristics of an electromagnetic field are expressed mathematically by Maxwell's equations. See also: Electric field; Electromagnetic radiation; Electromagnetic wave; Maxwell's equations
Beams, Jesse W. Formerly, Department of Physics, University of Virginia, Charlottesville, Virginia.
Last reviewed:June 2020
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- J. S. Gaynor, S. Hagberg, and B. T. Gurfein, Veterinary applications of pulsed electromagnetic field therapy, Res. Vet. Sci., 119:1–8, 2018 DOI: https://doi.org/10.1016/j.rvsc.2018.05.005
- E. I. Waldorff, N. Zhang, and J. T. Ryaby, Pulsed electromagnetic field applications: A corporate perspective, J. Orthop. Translat., 9:60–68, 2017 DOI: https://doi.org/10.1016/j.jot.2017.02.006
- J. Franklin, Classical Electromagnetism, 2nd ed., Dover Publications, 2017
- D. J. Griffiths, Introduction to Electrodynamics, 4th ed., Cambridge University Press, 2017
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