Xc=1/(2Pifc)- K' c; u6 o% Y$ b% I. l _
if f=0 Xc is infinite, so capacitor block DC. 9 K( n! ~- V& I) xfor AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
原帖由 爱城电工 于 2009-1-12 19:16 发表 1 b' F: E- C% Y, _为什么电容器阻断DC 而通AC?
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/ d' {: d- C# A) e1 \I would like to ask a question, just for curiosity, if you do not mind. * [5 j! [0 F5 o3 [ W3 v: Z6 J9 F8 j E6 ]7 {: e; U. D8 l
Is that a real question during your interview for an electrician job?
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发表于 2009-1-12 19:16
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发表于 2009-1-16 21:47
