Xc=1/(2Pifc); Y+ O5 e. o) C6 ^: f8 r) k
if f=0 Xc is infinite, so capacitor block DC.. u9 y2 v/ z/ Q- u4 M- \; ~
for AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
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I would like to ask a question, just for curiosity, if you do not mind. ; b; _4 ~ |9 l9 k( E $ T% i# D1 c3 G$ o7 ?% e. NIs 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
