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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.

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.

- 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...

- 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...

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