Hi guys, I'm new to this forum and am not sure where I would ask this question so sorry if it's out of place :/ But I want to know what voltage is exactly. I've asked lecturers, friends and i don't get it! I know that its measured in J/C, and that its the difference in potential energy between two places. But I don't know why voltage increases current (this is unlike the analogy with gravitational potential energy) and why as if it is just the difference in potential energy, surely the same amount of current would flow but for a longer period of time? Considering the fact that more voltage means more energy for, say, a circuit with a resistor. If the current increases doesn't that mean more energy is being used up quicker? And why? :/ This is doing my head in!