impedance
impedance
n.
total amount of resistance (Electricity, Physics); obstacle, hindrance
Impedance
Impedance is the complex-valued generalization of
resistance. It may refer to:
- Acoustic impedance, a constant related to the propagation of sound waves in an acoustic medium
- Electrical impedance, the ratio of the voltage phasor to the electric current phasor, a measure of the opposition to time-varying electric current in an electric circuit
- Mechanical impedance, a measure of opposition to motion of a structure subjected to a force
- Wave impedance, a constant related to electromagnetic wave propagation in a medium
impedance
Noun
1. a material's opposition to the flow of electric current; measured in ohms
(synonym) electric resistance, electrical resistance, resistance, resistivity, ohmic resistance
(hypernym) electrical phenomenon
(hyponym) ohmage
impédance
nf.
impedance, total amount of resistance (Electricity, Physics); obstacle, hindrance
impedance
The total passive opposition offered to the flow of electric current.
Note 1: Impedance is determined by the particular combination of resistance, inductive reactance, and capacitive reactance in a given
circuit. (
188 )
Note 2: Impedance is a function of
frequency, except in the case of purely resistive networks.