36.如圖4 所示之串並聯電路,電源 = 24V, R1 = 4kO, R2 = 40kO, R3 = 30kO, R4 = 15kO, R5 = 10kO, R6 = 20kO, 試求電流I1等於多少毫安培(mA)?


(A) 1mA
(B) 2mA
(C) 3mA
(D) 4mA

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