9.如圖所示電路,R = 80Ω ,XC = 60Ω ,若電阻兩端的電壓為80V,則電源電壓為
(A)60V
(B)120V
(C)100V
(D)200V
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統計: A(1), B(0), C(9), D(1), E(0) #1507738
統計: A(1), B(0), C(9), D(1), E(0) #1507738