In a parallel part of a circuit, there are two nodes, one at each end of the parallel part.
The potential difference can be arrived at by subtracting the voltage from one node to the other one.
The current in the two or more paths can be different, but the voltage difference is the same because they share those two nodes (nodes=intersections of wires). Is that what you meant??
Also see nodal analysis, which deals with intersections.
Another analysis, which I can't remember the name of, deals with loops or circular paths that you can draw in a circuit. Might start with an "m", can't remember.
...Oh, mesh analysis, I think.
Last edited by John E. Franklin (2007-06-17 15:23:06)