Question

A sinusoidal voltage of peak value 200 volts is connected to a diode and resistor R in the circuit shown. If diode is ideal, the r.m.s. voltage across R is________ volt. 

(A) 100 

(B) {(200) / √2} 

(C) 200 

(D) 280

Answer 1

The correct option is (B) {(200) / √2}.

Explanation:

V_P = 200V

This is half wave rectifier. Hence V_rms across resistor R is V_rms = {V_m / √2}

Provided that diode is ideal. Hence V_rms = {(200) / √2}.