実効値

$\displaystyle P_0$	$\textstyle =$	$\displaystyle \frac{{i_0 v_0 }}{2} = \frac{{i_0 }}{{\sqrt 2 }}\frac{{v_0 }}{{\sqrt 2 }}$	(9)
$\displaystyle I_e$	$\textstyle =$	$\displaystyle \frac{{i_0 }}{{\sqrt 2 }}\qquad V_e = \frac{{v_0 }}{{\sqrt 2 }}$	(10)
$\displaystyle P_0$	$\textstyle =$	$\displaystyle I_eV_e$	(11)