Calculadora de Impedância do Capacitor
Calcule a reatância capacitiva de um capacitor em uma frequência específica de corrente alternada.
µF
Hz
Capacitive Reactance (Xc)
15.92 Ω
Capacitive Reactance (Xc) vs Capacitance
Formula
## Capacitive Reactance **Xc = 1 / (2 x pi x f x C)** Reactance decreases with frequency: capacitors pass high frequencies and block low frequencies (DC).
Exemplo Resolvido
10 uF capacitor at 1 kHz.
- 01C = 10 uF = 0.00001 F
- 02Xc = 1 / (2 x pi x 1000 x 0.00001)
- 03Xc = 1 / 0.06283 = 15.92 ohms
Perguntas Frequentes
Why does reactance decrease with frequency?
At higher frequencies the capacitor charges/discharges faster, presenting less opposition to current flow.
Is reactance the same as resistance?
No. Reactance causes a 90-degree phase shift between voltage and current. It does not dissipate power.
What about ESR?
Real capacitors have equivalent series resistance (ESR) that adds to the impedance and does dissipate power.
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