[填空题]
A silicon diode passes p1.vr5 vposi; significant current only if the forward-bias :r ii,pl+lc8sgm e -ejd:,; 2cu9bwiuvoltage exceeds about 0w;jml ir8i:cp:du +- egiule,29s c,b.6 V. Make a rough estimate of the average current in the output resistor $ R $ of
(a) a half-wave rectifier (Fig. Below a),$I _{av}$ = mA
(b) a full-wave rectifier (Fig. Below b) without a capacitor. Assume that $ R = 150\ \Omega $ in each case and that the ac voltage is 12.0 V rms in each case. $I _{av}$ = mA
a
b