A series LCR circuit containing 5.0 H inductor, 80 μ F capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular…

A series LCR circuit containing $\displaystyle 5.0$ H inductor, $\displaystyle 80 \mu \mathrm{~F}$ capacitor and $\displaystyle 40 \Omega$ resistor is connected to $\displaystyle 230$ 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 :