is: a coil designed to have a large inductance so as to produce a large induced voltage when the current in it changes. [P4.4, P4.5]
typically is: a solenoid with many closely-wound turns around a magnetic material (e.g. an iron core). [P4.5]
in a circuit is: a circuit component of fixed inductance and, ideally, negligible resistance. [P5.4, P5.5]
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