[填空题]
A 120-V rms 60-Hz voltage is to be +)oyjmj u u kb71pw u.znww,)/rectified with a full-z i:fa9 kbd-7ot.f6t jy+m7zbvkr51xwave rectifier (Fig. Below)95fzo7 1 +tkjit7bk:ad vf xr6-.bzym, where $ R = 21\ \text{k}\Omega $ and $ C = 25\ \mu\text{F} $.
(a) Make a rough estimate of the average current. $I_{av}$ = mA(smooth)
(b) What happens if $ C = 0.10\ \mu\text{F} $?$I_{av}$ = mA (rippled)