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impedance 音标拼音: [ɪmp'idəns] n. 阻抗 阻抗 impedance阻抗 impedance阻抗 impedance n 1: a material' s opposition to the flow of electric current; measured in ohms [ synonym: { electric resistance}, { electrical resistance}, { impedance}, { resistance}, { resistivity}, { ohmic resistance}] Impedance \ Im* ped" ance\, n. [ Impede - ance.] ( 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 root{ R^{ 2} X^{ 2}}, where R = ohmic resistance, X = reactance. For an inductive circuit, X = 2[ pi] fL, where f = frequency and L = self- inductance; for a circuit with capacity X = 1 [ div] 2[ pi] fC, where C = capacity. [ Webster 1913 Suppl.] 18 Moby Thesaurus words for " impedance": 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
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