bucking coil

bucking coil

[′bək·iŋ ‚kȯil]
(electromagnetism)
A coil connected and positioned in such a way that its magnetic field opposes the magnetic field of another coil; for example, the hum-bucking coil of an excited-field loudspeaker.
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References in periodicals archive ?
Half-latched operation uses a permanent magnet to bias the microwave ferrite in the latched state; this field is overcome and reversed by a bucking coil in the unlatched state.