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permanent-magnet moving-coil instrument |
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permanent-magnet moving-coil instrument [′pər·mə·nənt ¦mag·nət ¦müv·iŋ ¦kōil ′in·strə·mənt] (engineering) An ammeter or other electrical instrument in which a small coil of wire, supported on jeweled bearings between the poles of a permanent magnet, rotates when current is carried to it through spiral springs which also exert a restoring torque on the coil; the position of the coil is indicated by an attached pointer. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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