Capacitive Reactance

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Capacitive reactance X_C is:

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A capacitor opposes the flow of alternating current. This opposition is called **Capacitive Reactance** ($X_C$).
$X_C = \frac{1}{\omega C} = \frac{1}{2\pi f C}$
- $X_C$ is inversely proportional to frequency ($f$).
- For DC ($f=0$), $X_C = \infty$ (capacitor acts as an open circuit).
- Current leads voltage by $90^\circ$ in a purely capacitive circuit.

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Capacitive Reactance

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