Xc=1/(2Pifc) ; G0 R& [, y! i2 R5 I) D7 sif f=0 Xc is infinite, so capacitor block DC. % z' y1 J4 S6 _8 _! \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 ! T- q) ^9 |# L0 C) u
为什么电容器阻断DC 而通AC?
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3 H. ~: r$ Y- M# X& C9 E+ EI would like to ask a question, just for curiosity, if you do not mind. ; y) f; g- z2 ~6 W& p4 \ d9 I; x/ r9 s0 ^' B$ x- m% u
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