Xc=1/(2Pifc) 2 k/ ^1 ?' g4 h+ q( d& P3 \! ]if f=0 Xc is infinite, so capacitor block DC. h% x; G) Y, } X2 r# E3 E" D, xfor 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 ( r) R. `4 }3 ?. a6 s
为什么电容器阻断DC 而通AC?
/ T# I3 t: m7 n1 C1 T$ \) T 0 T2 W8 e+ D. ^8 h6 N. c& mI would like to ask a question, just for curiosity, if you do not mind.& Y6 F8 g4 n* z$ d- i1 F3 O2 C
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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