Well, this is a totally hypothetical, ideal world question. So let's say the point where electrons enter and exit the infinite sheet are infinitely small... points. And that the return wire is infinitely far away. The electrons, in effect, just teleport in and out, subject to the constraint...
The return path is not the plane of the sheet. Imagine a 1 volt battery with the positive end connected to one of the points, as described in the first post, through a zero resistance wire and the negative end connected to the other point.
Sometimes if you try to step it too fast it will skip steps. Also, you may need to ramp up the stepping speed because the motor can't go from zero to maximum speed instantaneously.
I am trying to determine the size of a conductive 2-D sheet that has a specified degree of increased resistance (or reduced conductivity) compared to an infinite sheet.
Imagine that electrons enter the infinite sheet and exit the sheet at 2 points which are 1 unit of distance apart and aligned...