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6 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 im·ped·ance /ɪmˈpidṇ(t)s/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 im·ped·ance /ɪmˈpɪdṇ(t)s/ 名詞

From: Taiwan MOE computer dictionary


From: Network Terminology


From: Webster's Revised Unabridged Dictionary (1913)

 Im·ped·ance n.   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 = 2πfL, where f = frequency and L = self-inductance; for a circuit with capacity X = 1 ÷ 2πfC, where C = capacity.

From: WordNet (r) 2.0

      n : a material's opposition to the flow of electric current;
          measured in ohms [syn: electric resistance, electrical
          resistance, resistance, resistivity, ohmic