Series LCR Circuit – Resonance and Half-power Frequencies

2021 1 question

1. A series LCR circuit containing 5.0 H inductor, $80\ \mu F$ capacitor and $40\ \Omega$ resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be: