In resonant circuit, at resonant frequency

The sharpness of resonance or Q value of resonant circuit with resonant frequency f_(r) and half power frequency f_(1) and f_(2) is

The sharpness of resonance or Q value of resonant circuit with resonant frequency f_r and half power frequency f_1 and f_2 is

In a series LCR circuit, at resonant frequency.

In parallel resonant circuit, at resonance

In parallel resonant circuit, at resonance

In rejector circuit, above resonant frequency the circuit is

In series resonant circuit, at resonance,

Power in an ac circuit | Resonant frequency

In an LCR. series circuit the resonating frequency can be decreased by -