impedance
noun Date: 1886 something that impedes ; hindrance: as a. the apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current b. the ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • impédance — [ ɛ̃pedɑ̃s ] n. f. • 1892; angl. impedance (1886); du lat. impedire « empêcher » ♦ Électron. Rapport (exprimé en ohms) entre les valeurs efficaces de la tension aux bornes d un circuit et de l intensité du courant sinusoïdal qui le traverse. L… …   Encyclopédie Universelle

  • Impedance — is a concept associated with the transmission of waves and electrical signals. There are many kinds of waves, and impedance is different in each of them, hence this disambiguation page. However, impedance is also a unifying concept. It is related …   Wikipedia

  • Impedance — Impédance Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Le terme Impédance est utilisé dans plusieurs domaines: Celui de l électricité et de l électronique, voir l article Impédance (électricité)… …   Wikipédia en Français

  • 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… …   The Collaborative International Dictionary of English

  • impedance — index deterrent, offset Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • impedance — (n.) 1886, from IMPEDE (Cf. impede) + ANCE (Cf. ance) …   Etymology dictionary

  • impedance — ► NOUN ▪ the effective resistance to an alternating electric current arising from the combined effects of ohmic resistance and reactance …   English terms dictionary

  • impedance — [im pēd′ ns] n. [< IMPED(E) + ANCE] 1. the total opposition offered by an electric circuit to the flow of an alternating current of a single frequency: it is a combination of resistance and reactance and is measured in ohms: the reciprocal of… …   English World dictionary

  • Impédance — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Le terme Impédance est utilisé dans plusieurs domaines: Celui de l électricité et de l électronique, voir l article Impédance (électricité) Impédance… …   Wikipédia en Français

  • impedance — kompleksinės varžos modulis statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. impedance; modulus of impedance vok. Betrag der Impedanz, m; impedanz Modul, m rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • impédance — kompleksinės varžos modulis statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. impedance; modulus of impedance vok. Betrag der Impedanz, m; impedanz Modul, m rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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