I need help with the idea of voltage as it relates to electric circuits. My book doesn't explain the concept well enough. All it says is that voltage is the force that moves charge through a circuit and overcomes resistance. Then it just states Ohm's Law, V=IR. Here are the things I don't understand. If someone could give a brief explanation, that would be great. 1) If a cell moves charge through a circuit without any relevant resistance, is voltage from the cell still present but not doing anything, or is it not present at all? 2) Is voltage "used up"? If 6V cell moves charge through a resistor that requires 1V, then afterwards would there only be 5V left? 3) If a 5V cell is connected in series to a parallel circuit, would each "branch" of the parallel circuit have 5V? I can draw some pictures to show you what I mean if my questions don't make sense.