Subject: Speed of electricity

My question is this:  If we were to run an electrical cord up to the top of a 
high-rise building and send electricity up and down the cord, would the 
electricity travel faster going down because of gravity?  If so, I believe 
it would only travel like a millionth of a nanosecond faster, and it would be 
immeasureable. I would guess that gravity can play some part in this, because 
if the gravity of a black hole can bend light then it must effect electricity.

Re: Speed of electricity