impedance
Pronunciation: /ɪmˈpiːd(ə)ns/
Definition of impedance
noun
- the effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance. See also acoustic impedance.
- Impedance is usually expressed as a complex quantity Z = R + jX, where R is resistance, X is reactance, and j is the imaginary square root of −1