유도 리액턴스는

\displaystyle X_L = 2\pi f L = 2\pi \cdot (60.0\ \mathrm{Hz}) \cdot (0.045\ \mathrm{H}) \approx 16.96\ \Omega

임피던스는

\displaystyle Z = \sqrt{R^2 + X_L^2} = \sqrt{(20.0\ \Omega)^2 + (16.96\ \Omega)^2} \approx 26.22\ \Omega

rms 전류는

\displaystyle I_{\mathrm{rms}} = \dfrac{V_{\mathrm{rms}}}{Z} = \dfrac{120\ \mathrm{V}}{26.22\ \Omega} \approx 4.577\ \mathrm{A}

평균 전력은 저항에서만 소모되므로

\displaystyle P_{\mathrm{avg}} = I_{\mathrm{rms}}^2 R = (4.577\ \mathrm{A})^2 \cdot (20.0\ \Omega) \approx 419\ \mathrm{W}