# Definition of Impedance. Meaning of Impedance. Synonyms of Impedance

Here you will find one or more explanations in English for the word Impedance. Also in the bottom left of the page several parts of wikipedia pages related to the word Impedance and, of course, Impedance synonyms and on the right images related to the word Impedance.

## Definition of Impedance

Impedance
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 current. It is equal to rootR^2 + X^2}, where R = ohmic resistance, X = reactance. For an inductive circuit, X = 2[pi]fL, where f = frequency and L = self-inductance; for a circuit with capacity X = 1 [div] 2[pi]fC, where C = capacity.

## Meaning of Impedance from wikipedia

- Nominal impedance, approximate designed impedance Impedance matching, the adjustment of input impedance and output impedance Mechanical impedance, a measure...
- In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit...
- The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current...
- In electronics, impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding...
- The input impedance of an electrical network is the measure of the opposition to current (impedance), both static (resistance) and dynamic (reactance)...
- The wave impedance of an electromagnetic wave is the ratio of the transverse components of the electric and magnetic fields (the transverse components...
- The output impedance of an electrical network is the measure of the opposition to current flow (impedance), both static (resistance) and dynamic (reactance)...
- In electronics, high impedance means that a point in a circuit (a node) allows a relatively small amount of current through, per unit of applied voltage...
- Acoustic impedance and specific acoustic impedance are measures of the opposition that a system presents to the acoustic flow resulting from an acoustic...
- The impedance of free space, Z0, is a physical constant relating the magnitudes of the electric and magnetic fields of electromagnetic radiation travelling...