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impedance
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impedance
n.
total amount of resistance (Electricity, Physics); obstacle, hindrance
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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
- Characteristic impedance of a transmission line
- Impedance (accelerator physics), a characterization of the self interaction of a charged particle beam
- Nominal impedance, approximate designed impedance
- 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 of free space, a universal constant and the simplest case of a wave impedance
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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
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impédance
nf.
impedance, total amount of resistance (Electricity, Physics); obstacle, hindrance
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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.
