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1 如圖所示,Vi = AC100V,變壓器 N1:N2 = 10:1 二極體是理想二極體,則電路中電容C3兩端的電壓為?
A 10V
B 20V
C 14.1V
D 28.2V

變壓器二次則電壓:VAC=100/10=10V;Vm=10 ×1.414 =14.1V

C3 = 2Vm= 14.1 × 2 = 28.2V