An $a.c.$ of frequency $f$ is flowing in a circuit containing only an ideal choke coil of inductance $L$. If $V_0$ and $i_0$ represent peak values of the voltage and the current respectively,the average power given by the source to the choke coil is equal to
- A$\frac{1}{2} i_0 V_0$
- B$\frac{1}{2} i_0^2(2 \pi f L)$
- CZero
- D$\frac{1}{2} V_0(2 \pi f L)$
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