单词 | permanent-magnet moving-coil instrument |
释义 | permanent-magnet moving-coil instrument [`pǝr·mǝ·nǝnt ¦mag·nǝt ¦müv·iŋ ¦kōil `in·strǝ·mǝnt] 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. |
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