Xc=1/(2Pifc) |& j; n# j0 v: b" b5 k. {
if f=0 Xc is infinite, so capacitor block DC.3 H1 t8 C1 s% H: H) p z
for AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
+ U( n& @$ g# w8 v; k3 k% bI would like to ask a question, just for curiosity, if you do not mind. ) ]/ Y: p# k+ }- C. K/ l# H, R: ~9 i; i
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
