Xc=1/(2Pifc)" Q6 _! D' X* @+ m; p+ m
if f=0 Xc is infinite, so capacitor block DC. & i q' c$ T( {4 x! y K2 dfor 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 4 {% x: S( R' B; K s; i
为什么电容器阻断DC 而通AC?
; H% M$ z4 L" h* l ` 7 q. ?& G Y* UI would like to ask a question, just for curiosity, if you do not mind. 3 V: o3 ?& ]7 g3 X' u5 g0 p 4 Q! |6 s; `1 B& wIs that a real question during your interview for an electrician job?