I find this wording a bit confusing. I suggest to mention that this graph is directed. Otherwise the point about the passive sign convention doesn't make sense. Furthermore I'd suggest to write ... "an abstracted flow of current ..." because I understand that there is an "abstract flow". Also we are following the passive the passive sign convention.

The lines you are referring to do not talk about graphs at all. How this turns into a graph is explained in the next line.

I added the term directed in the next line where it mentions graphs.

Furthermore I'd suggest to write ... "an abstracted flow of current ..." because I understand that there is an "abstract flow". Also we are following the passive the passive sign convention.

Difficult to follow you here. I updated the text again. Note that we want to keep it high-level and not add too much tech detail here.