問題詳情
44. 如下圖所示電路，若電感器在開關閉合前無任何儲能，則開關 S 最少要閉合(ON)多久，電感器的電壓 VL 才會趨近於零？
(A) 0 毫秒
(B)2.5 毫秒
(C)5 毫秒
(D)20 毫秒。 
參考答案
答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(13),D(0),E(0)
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