20. 如圖(十四)所示電路,若量測得電流I=4.5A,則電壓Va為何?
(A) 4V
(B) 6V
(C) 8V
(D) 10V
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統計: A(13), B(19), C(18), D(35), E(0) #3229644
統計: A(13), B(19), C(18), D(35), E(0) #3229644