Question:

A series LCR circuit with $\backslash (\backslash$mathrm$\{$R$\}=20\backslash$mathrm$\{$~W$\},\backslash$mathrm$\{$~L$\}=1\mathrm{.}5\backslash$mathrm$\{$H$\}\backslash )$ and $\backslash (\backslash$mathrm$\{$C$\}=35\backslash$mu $\backslash$mathrm$\{$~F$\}\backslash )$ is connected to a variablefrequency $200$ V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?