There are a couple of things that just make no sense to me regarding circuits. Let me start off with my train of thought and how it leads into my questions, so someone can tell me where I go wrong. Question 1 (comes directly from a picture attached): A potential difference is setup between two points, perhaps the terminals in a battery, and this causes charges to move. However, the potential difference is of course created by an electric field. Right? Every potential difference, or voltage, MUST be created by some electric field. Now the electric field of course produces forces on the charges, which in turn causes them to move, creating a current. Shouldn't the electric field be weakening as the inverse square of distance? Why then is the electric field taken to be constant? Current is how much charge per unit time is passing through a certain point, so the current should be different at every single point since the force which moves the current is different at every point and the mass of the charge of course doesn't change. So why is it said that the current will be the same through every point in a resistor in series combination? This question originates from the picture I have attached...Quick Quiz 28.2...I thought the answer would be a) smaller...but apparently the answer is the same. Why would the charges still be moving at the same speed when not only should the field be changing, but their potential has dropped. If anybody could explain the error in my thinking here, I'd be very thankful.