Capacitive Reactance

📊 intermediate

$$X_C = \frac{1}{2\pi f C}$$

Opposition to change in voltage in an alternating current circuit.

Variables & Units

$X_C$

Capacitive Reactance

Unit: Ohm ($\Omega$)

$f$

Frequency

Unit: Hertz ($Hz$)

$C$

Capacitance

Unit: Farad ($F$)

Key Information

📐 Derived From

Phase relationship between current and voltage in a capacitor.

💡 Example

Calculating impedance of a $10 \mu F$ capacitor at $60 Hz$.

🔧 Applications

Radio tuning and crossover networks in speakers.

⚠️ Constraints

Applies to sinusoidal AC signals.

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