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back emf

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noun
electrical engineering an electromagnetic force appearing in an inductive circuit in such a direction as to oppose any change of current in the circuit
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My grandmother ________ a wall full of antique cuckoo clocks.
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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