Voltage regulation:

Ideally, the average rectifier output voltage should remain constant. But practically it varies with the changes in the load current. Voltage regulation is defined as:

$Voltage\ regulation\ =\ \dfrac{V_{NL}-\ V_{FL}}{V_{FL}}\times{}100\%$

Where VNL = Average load voltage at no load i.e. when RL = ∞

$\therefore{}\ V_{NL}=\frac{V_m}{\pi{}}$

No …