im·ped·ance ( m-p d ns)n. 1. Symbol Z A measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance. 2. An analogous measure of resistance to an alternating effect, as the resistance to vibration of the medium in sound transmission. |
impedance [imp-eed-anss]
Noun
Electricity the total effective resistance in an electric circuit to the flow of an alternating current
| impedance (m-pdns) A measure of the opposition to the flow of alternating current through a circuit. Impedance is measured in ohms. The resistance of a circuit to direct current (also measured in ohms) is generally not the same as its impedance, due to the effects of capacitance and induction in and among the components of the circuit. See also impedance matching. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  impedance - a material's opposition to the flow of electric current; measured in ohmselectrical phenomenon - a physical phenomenon involving electricity ohmage - the ohmic resistance of a conductor |
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