37. 如下圖所示,從線圈來看,其總磁阻為何?

(A)R1+R2+R3
(B)R1 R2/(R1+R2)+R3
(C)R1+R2 R3/(R2+R3)
(D)R1 R3/(R1+R3)+R2

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統計: 尚無統計資料