An inductor of a reactance $1 \Omega$ and a resistor of $2 \Omega$ are connected in series to the terminals of a$6\;v(r.m.s)$ a.c source. The power dissipated in the circuit is

Question

$\begin{array}{1 1} 8\;w \\ 12\;w \\ 14.4\;w \\ 18\;w \end{array} $