I have a few questions about voltage. Is it always measured between two points, or can it be measured between two objects? What gives an object more electrical potential? Is it just free electrons? Can there be a voltage between two neutrally charged objects? Why does voltage drop occur through resistors? I've heard people say that it was because energy was being used, but if voltage is difference in electrical potential, then when current starts to flow I would thinks some of that would be lost to kinetic energy of the electrons.