Xc=1/(2Pifc)9 E$ ?* i/ s) _/ `
if f=0 Xc is infinite, so capacitor block DC. 7 s& q' k' O2 z. v. Wfor AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
; x( g" u, X6 W+ D6 ?, R' b4 Z/ W
, v3 A0 e4 j9 y) b3 c: @5 \
I would like to ask a question, just for curiosity, if you do not mind., I: H% E" ]8 ^$ w. G% [
) L* ~3 [8 C8 r/ c7 \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