State the characteristics of a parallel LC AC resonance circuit. - Vidyadip

Question

State the characteristics of a parallel LC AC resonance circuit.

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Answer

Characteristics of a parallel LC AC resonance circuit:
1. Resonance occurs when inductive reactance $\left(X_L=2 \pi f L\right)$ equals capacitive reactance $\left(X_c=\frac{1}{2 \pi f C}\right)$
Resonant frequency, $f _{ r }=\frac{1}{2 \pi \sqrt{L C}}$
2. Impedance is maximum.
3. Current is minimum.
4. The circuit rejects $f _{ r }$ but allows the current to flow for other frequencies. Hence, it is called a rejector circuit.

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