I have recently read that the electric field strength can be compared between 2 points from the relative field line density but I am having trouble in applying the concept. What I find confusing is the field line density.
I feel the main problem is that (according to me) we need to compare how close the field lines are in an area around the point. But what is that area going to be? Is it going to be a circle centered at the point? If yes, will it be a small circle or a circle of any radius? It would be of great help if somebody could explain the concept and relate it to the diagram I have drawn: