How should we visualize what pushes the electron goop forward? If it's like water pressure, that would make the hindmost goop bunch up with the foremost goop.
Presumably electricity has something to do with positive charge at the back of the 'pipe' and negative charge at the 'front' (or have I got those backward?), perhaps a better visualization would be that they're all rolling down an inclined plane together?
Current flows due to a difference in electric potential, which is called voltage. This is similar to the difference in gravitational potential that causes a ball to roll downhill. If imagining electricity like water, then voltage is lifting up one end of the pipe (or water going over a waterfall of a certain height).
Presumably electricity has something to do with positive charge at the back of the 'pipe' and negative charge at the 'front' (or have I got those backward?), perhaps a better visualization would be that they're all rolling down an inclined plane together?