## Electrical reactance |

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Proposed since November 2017. |

In electrical and electronic systems, **reactance** is the opposition of a circuit element to a *change* in

In

- capacitive reactance
- inductive reactance
- impedance
- see also
- references
- external links

A capacitor consists of two

*Capacitive reactance* is an opposition to the change of voltage across an element. Capacitive reactance is
^{
[1]}

There are two choices in the literature for defining reactance for a capacitor. One is to use a uniform notion of reactance as the imaginary part of impedance, in which case the reactance of a capacitor is a negative number:^{
[1]}^{
[2]}^{
[3]}

Another choice is to define capacitive reactance as a positive number,^{
[4]}^{
[5]}^{
[6]}

In this case however one needs to remember to add a negative sign for the impedance of a capacitor, i.e. .

At low frequencies a capacitor is an
open circuit so no

A

Driven by an AC supply (ideal AC current source), a capacitor will only accumulate a limited amount of charge before the potential difference changes polarity and the charge is returned to the source. The higher the frequency, the less charge will accumulate and the smaller the opposition to the current.

Other Languages

Afrikaans: Reaktansie

العربية: مفاعلة كهربائية

Bân-lâm-gú: Tiān-khòng

български: Реактивно съпротивление

català: Reactància

čeština: Reaktance

dansk: Reaktans

Deutsch: Blindwiderstand

eesti: Reaktiivtakistus

Ελληνικά: Άεργη αντίσταση

español: Reactancia

Esperanto: Reaktanco

euskara: Erreaktantzia elektriko

فارسی: راکتانس الکتریکی

français: Réactance (électricité)

Gaeilge: Freasaitheacht

galego: Reactancia

한국어: 반응저항

हिन्दी: वैद्युत प्रतिघात

hrvatski: Električna reaktancija

Bahasa Indonesia: Reaktansi listrik

íslenska: Launviðnám

italiano: Reattanza

עברית: היגב

latviešu: Reaktīvā pretestība

lietuvių: Reaktyvioji varža

magyar: Meddő ellenállás

македонски: Реактанса

Nederlands: Reactantie

नेपाल भाषा: रियाक्ट्यान्स

日本語: リアクタンス

norsk: Reaktans

norsk nynorsk: Reaktans

polski: Reaktancja (elektryczność)

português: Reatância

română: Reactanță electrică

русский: Реактивное сопротивление

slovenčina: Reaktancia

slovenščina: Reaktanca

Basa Sunda: Réaktansi

suomi: Reaktanssi

svenska: Reaktans

Tagalog: Reaktansiya

தமிழ்: மின்மறுப்பு

татарча/tatarça: Реактив каршылык

Türkçe: Reaktans

українська: Реактивний опір

粵語: 電抗

中文: 电抗