Xc=1/(2Pifc) ' |; V0 c- n/ \* ]if f=0 Xc is infinite, so capacitor block DC.) S9 c& ^- r; ` k# p
for 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 # ^$ W8 A, c6 t
为什么电容器阻断DC 而通AC?
: }2 Z# F2 j5 K5 e/ L( P! Z 2 z/ A( Y& V3 _+ W% s8 fI would like to ask a question, just for curiosity, if you do not mind. 3 e2 q" H3 ~. w8 O- r$ u, V& E+ o2 @% C2 A9 h" W5 b4 @1 ^7 ]; W
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
