Xc=1/(2Pifc)3 G0 A. x4 A4 z0 b, B2 n6 `
if f=0 Xc is infinite, so capacitor block DC.3 f: m' ^% d5 D" s5 r8 Z/ a- n- u
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 . J' O, ?2 }. O6 p, b3 t% o
为什么电容器阻断DC 而通AC?
# N) r- L4 t2 a0 }
, R, O# k& D9 x+ H1 ~I would like to ask a question, just for curiosity, if you do not mind. / L0 {, \' H: h& \* o, { ' A* F. F& e4 F4 b+ JIs 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
