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Constant314 (talk | contribs) Both have zero resistance and zero conductance. Tag: Reverted |
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In electrical circuits, '''reactance''' is the opposition presented to [[alternating current]] by [[inductance]] and [[capacitance]].<ref name="veley01">{{cite book |author-first= Victor F. C. |author-last=Veley |title=The Benchtop Electronics Reference Manual |edition=1st |location=New York |publisher=Tab Books |date=1987 |pages=229, 232|url=https://archive.org/details/benchtopelectron00vele }}</ref> Along with resistance, it is one of two elements of [[Electrical impedance|impedance]]; however, while both elements involve transfer of electrical energy, no [[Joule heating|dissipation of electrical energy as heat]] occurs in reactance; instead, the reactance stores energy until a quarter-cycle later when the energy is returned to the circuit. Greater reactance gives smaller current for the same applied [[voltage]].
Reactance is used to compute [[amplitude]] and [[Phase (waves)|phase]] changes of [[Sine wave|sinusoidal]] alternating current going through a circuit element. Like resistance, reactance is measured in [[ohm]]s, with positive values indicating ''inductive'' reactance and negative indicating ''capacitive'' reactance. It is denoted by the symbol <math>X</math>. An ideal [[resistor]] has zero reactance, whereas ideal [[inductor]]s and [[capacitor]]s have zero resistance and conductance
== Comparison to resistance ==
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