A series LCR circuit with $R= 20\; \Omega, L= 1.5\;H$ and $C= 35\;\mu F$ is connected to a variable frequency 200 v a.c 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 ?

Question

$\begin{array}{1 1} 20\;w \\ 200 w \\ 0 \\ 2000\;w \end{array}$