Impedansi
\(Z = \sqrt{R^2 + (X_L - X_C)^2}\)
Tegangan dan kuat arus
\(V = I \:.\: Z\)
\(V_R = I \:.\: R\)
\(V_L = I \:.\: X_L\)
\(V_C = I \:.\: X_C\)
\(V = \sqrt{V_R^2 + (V_L - V_C)^2}\)
Beda fase tegangan dan arus
\(\tan \theta = \dfrac {X_L - X_C}{R}\)
\(\tan \theta = \dfrac {V_L - V_C}{V_R}\)