niste formule

V_{dc}=V_{av}=\frac{2V_p}{\pi}

V_{ac}=V_p{\sqrt{ \frac{1}{2}-\frac{4} {\pi^2}}}

V_{RMS}=\sqrt {V_{dc}^2 + V_{ac}^2} = \frac {V_p} {\sqrt 2}

Thus, the total amount of energy is the same after and before the full wave rectifier.