Characteristics of a parallel LC AC resonance circuit:
1. Resonance occurs when inductive reactance (X = 2πfL) equals capacitive reactance (XC = 1/2πfC)
Resonant frequency, fr = 1/2π√(LC)
2. Impedance is maximum.
3. Current is minimum.
4. The circuit rejects fr but allows the current to flow for other frequencies. Hence, it is called a rejector circuit.
