I'm trying to form a mental image what's happening with the electrons when you think of the following equation: ---- Power = volts*amperes volts = joules/coulomb amperes = coulomb/second ---- Amperes I understand that they tell you how many electrons go through a certain point every second. But when I look at the volts, it says "joules/coulomb"? This indicates that the electrons in the circuit can somehow behave differently or be different. If I change the volts but the amperes stay the same (ie. same amount of electrons running through the circuit), how can the electrons cause different behavior if they have the same charge and (I assume) same speed? Do the volts describe some kind of power by which the electrons are forced forward, even though with their regular speed. An analogy to this would be a bulldozer vs. human pushing an object at the same speed: bulldozer has much more power behind it's movement and doesn't stop easily when it hits obstacles. What's going on here? What are the electrons doing differently when the voltage is higher?