Xc=1/(2Pifc). x2 I; w( A2 v/ w
if f=0 Xc is infinite, so capacitor block DC., }5 \2 G8 ^; V4 h3 W% @% ^" ?, G) V6 m
for AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
0 f- L4 z2 o: N- @+ _* jI would like to ask a question, just for curiosity, if you do not mind.0 x& Y9 V3 T: E4 V% O2 S8 @
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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
