Xc=1/(2Pifc) 1 u: x# S* [- c4 Z) @if f=0 Xc is infinite, so capacitor block DC. 2 m {! W9 M/ I3 W: M2 _( ^for 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 ) c ~! o8 b3 q4 d, p `/ o为什么电容器阻断DC 而通AC?
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* U' | N( A% B$ UI would like to ask a question, just for curiosity, if you do not mind. 7 S6 o; H6 ]7 _7 m ; W$ z: I% e! q: E6 }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
