Earnshaw's theorem


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Earnshaw's theorem

[′ərn‚shȯz ‚thir·əm]
(electricity)
The theorem that a charge cannot be held in stable equilibrium by an electrostatic field.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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A 157-year-old principle known as Earnshaw's theorem stipulates that no arrangement of magnets can make them stay in a stable equilibrium, says Andre K.