Xc=1/(2Pifc)# c9 y# P% O7 {- v- B
if f=0 Xc is infinite, so capacitor block DC. 0 D9 M8 R" ~% o7 _6 m5 J, Gfor AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
/ r$ \4 z9 i6 u( j T7 t * x6 a- Q4 t8 T9 x( g6 r/ T7 WI would like to ask a question, just for curiosity, if you do not mind. 5 H9 I& c6 F: U ^# h ' M" l, b7 _: E7 I9 QIs 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
