(This is not a duplicate. I am asking this because I am confused with the potential difference provided by battery and the effect of R(resistance) in in determining the potential difference). Recently in my class I was presented with a $V$ vs $r$ graph where $V$ is the potential and $r$ is the distance travelled in the direction of current while the teacher was teaching Ohm's law [ (Change in potential)$ = IR $]. In the graph potential is shown constant before entering the resistor and while it passes through the resistor it drops by $IR$ and the graph is again constant after the current exits the resistor. It is bugging me for a long time now - how can the potential be constant if current is passing through it. Because I know that current flows in the direction of high potential to low potential and along the path the potential decreases.
