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Definition of impedance:

  1. The apparent resistance in an electric circuit to the flow of an alternating current, analogous to the actual electrical resistance to a direct current, being the ratio of electromotive force to the current. It is equal to R2 + X2, where R = ohmic resistance, X = reactance. For an inductive circuit, X = 2/ fL, where f = frequency and L = self- inductance; for a circuit with capacity X = 1 / 2/ fC, where C = capacity.

Synonyms:

ohmic resistance, blackout, immunity, resistance, resistivity, electric resistance, brownout, electrical resistance, arc light, active, arc, underground.

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