[填空题]
An ac voltage of 120 V rms id2g /n oalha )iys4jz0* ma3r4s to be rect.m5mon2us /aq ijye2 6a)auq (ified. Estimate very roughly the average 2 qjan.uuam 2qois m6ay5)(/ecurrent in the output resistor $ R $ ($ 25\ \text{k}\Omega $) for
(a) a half-wave rectifier(Fig. Below a), $I_{av}$ = mA
(b) a full-wave rectifier (Fig. Below b) without capacitor.$I_{av}$ = mA