Xc=1/(2Pifc). I% S3 m# \& B- @
if f=0 Xc is infinite, so capacitor block DC.1 z6 o" I. B$ |" l; M* ?7 ^
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 7 K& L- P' e! { B* s2 d+ b' \! |2 m为什么电容器阻断DC 而通AC?
3 C- n, V! F2 m. ^ ! h2 b+ r2 j1 }- {+ r& vI would like to ask a question, just for curiosity, if you do not mind. # H; a# ~8 o+ d) ^5 @( E8 \' Z% k" Z9 c
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
