[Potironette]

Ohh, it hadn't occurred to me that a wires could be not circular.

Hmm, so when there is PE, it basically means if there were charge at a certain position with PE, it would move some way. This means voltage measures the difference in how much a charge would get pulled at different points? But isn't current the same throughout the entire wire? Why would there be a difference in PE? Oh actually, I think I'm getting messed up between potential different and change in potential energy.
So..voltage measures difference in required potential energy per charge between two points? And as electrons move along, they require more potential energy per charge because of resistors using up energy? Or if electrons are forced the other way around..more PE per charge is required the other way around?
..Am I talking about cause-and-effect again? But without talking about cause-and-effect what does PE per charge mean?

If "brightly yellow sun" means the sun is brightly yellow, then does "starry blue sky" mean that technically, the sky is starry blue? Although, maybe people normally put a comma between starry and blue :/