8. 如圖(六)所示電路,a、b 兩端之戴維寧等效電壓VTh及等效電阻RTh為何?
(A) VTh=12V、RTh=6Ω
(B) VTh=18V、RTh=6Ω
(C) VTh=18V、RTh=3Ω
(D) VTh=12V、RTh=3Ω
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統計: A(9), B(10), C(69), D(14), E(0) #3229632
統計: A(9), B(10), C(69), D(14), E(0) #3229632