四極發電機，電刷中性面前移15°電工度，則去磁導體數為總導體數的？(A)l/12 (B)1/6 (C)1/3 (D)2/3

問題詳情

31.四極發電機，電刷中性面前移15°電工度，則去磁導體數為總導體數的？
(A)l/12
(B)1/6
(C)1/3
(D)2/3

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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