Impedance

n.

1.

(Elec.) 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, where f = frequency and L = self-inductance; for a circuit with capacity X = 1 , where C = capacity.

Noun

1.

impedance - a material's opposition to the flow of electric current; measured in ohms Synonyms: electric resistance, electrical resistance, ohmic resistance, resistivity, resistance

capacitive reactance, clog, cumbrance, electric resistance, hindrance, impediment, inductive reactance, magnetic reluctance, ohm, ohmage, reactance, reluctance, reluctivity, resistance, skin effect, specific reluctance, surface resistance, volume resistance