Physics - EMI/AC Question with Solution | TestHub

Average power in AC circuits is given by$\mathrm{P}={\mathrm{V}}_{\mathrm{rms}}{\mathrm{I}}_{\mathrm{rms}}\cos \mathrm{\varphi }$. For a purely capacitive circuit,$\mathrm{\varphi }=90°$so,$\mathrm{P}=0$.