# Telegrapher's equations

Something about the derivation of Telegrapher's equation is really bugging me. When deriving the Telgrapher's equations for a transmission line using a model as shown above, why do we only use a capacitor in parallel, and not a series capacitor? Same goes to the inductor in series: why not an inductor in parallel?

• sure, can you please transfer it to there? – meonstackexchange Oct 27 '13 at 17:11