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29 某平行金屬板電容器,將其極板面積加倍,但板間距離減半,則其電容量為原來的幾倍?(A)不變 (B)1/4 倍 (C)4 倍 (D)2 倍
問題詳情
29 某平行金屬板電容器,將其極板面積加倍,但板間距離減半,則其電容量為原來的幾倍?
(A)不變
(B)1/4 倍
(C)4 倍
(D)2 倍
參考答案
上一篇 :
28 某磁路其導磁係數 μ = 2 韋伯/(安培‧匝‧米),截面積 A = 0.5 m2,長度為 4 m,磁通量為 3 韋伯,則其磁動勢為多少?(A)12 安培 (B)12 安匝 (C)16 安培 (
下一篇 :
30 電感器 X 與電感器 Y 間之耦合係數為 0.64。若電感器 X 產生 0.25 Wb 的磁通量,則有多少磁通量會和電感器 Y 耦合?(A)0.20 Wb (B)0.18 Wb (C)0.16
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