Xc=1/(2Pifc)% v) ~$ r- Q2 E) d" N, L; h# ?
if f=0 Xc is infinite, so capacitor block DC. / n4 k! d0 l2 k) x0 h Rfor 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 , p4 P: f D4 M( x7 x o' G, u为什么电容器阻断DC 而通AC?
2 D7 W+ v5 R. l 3 F2 K# _7 b) j+ L( L' Q9 e+ @I would like to ask a question, just for curiosity, if you do not mind./ d9 ^( K4 {, f- [$ M" j* u
& \4 r) Z' O5 A! A0 q: r
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
