55.如【圖55】所示,求E= ?
(A)12V
(B)18 V
(C)24V
(D)36 V
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統計: A(88), B(136), C(170), D(245), E(0) #967085
統計: A(88), B(136), C(170), D(245), E(0) #967085
詳解 (共 2 筆)
#1613750
R=2r+(6r//12r)=6r
I=(12r*2a/6r)+2a=6a
V=IR=6*6=36v
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