Reactance

This article is about Electronics . For a discussion of "reactive" or "reactance" in Chemistry , see Reactivity .

For a discussion of the psychological concept of reactance, see Reactance (psychology) .

In the analysis of an Alternating-current Electrical Circuit (for example a RLC Series Circuit ), reactance is the imaginary part of Impedance , and is caused by the presence of Inductor s or Capacitor s in the circuit. Reactance is denoted by the symbol ''X'' and is measured in Ohms .

The relationship between impedance, resistance, and reactance is given by the equation:

:

Z = R + j X \,

where

Z

R

X

j

Often it is enough to know the magnitude of the impedance:

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