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moving coil

adjective
1.
denoting an electromechanical device in which a suspended coil is free to move in a magnetic field. A current passing through the coil causes it to move, as in loudspeakers and electrical measuring instruments, or movement of the coil gives rise to induced currents, as in microphones and some record-player pick-ups
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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