Xc=1/(2Pifc) 8 i6 j/ T/ S) S! L& m' Oif f=0 Xc is infinite, so capacitor block DC. / Q& B6 r% K' p: F" Ffor AC, frequence is 60Hz(in north american), so Xc is a specific value. as a result , it can conduct AC.
3 ?- Z2 U- G: D& p: Y( zI would like to ask a question, just for curiosity, if you do not mind. 7 X3 F# Y; F a$ V0 m+ m) N( l% ~. ?' ?1 H
Is that a real question during your interview for an electrician job?