Xc=1/(2Pifc)$ G. L+ [3 o; G1 d& v. |
if f=0 Xc is infinite, so capacitor block DC.$ ^: G% f" ?- U I, G+ ?. ^
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 - Y: q& S2 |- W: v. e# e8 y, y为什么电容器阻断DC 而通AC?
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I would like to ask a question, just for curiosity, if you do not mind. * K+ ~ V9 ^2 m% _3 t( I- t4 G G" ^4 J! y( J2 `8 P
Is that a real question during your interview for an electrician job?