Hi, I don't have a set question that needs answering, I'm just a little confused and need some clarifying if that's possible.. We've been investigating equipotentials and electric field lines between two electrodes with conductors and insulators between the electrodes. With a conducting cylinder between the electrodes we got the equipotential lines sort of bulged around the cylinder and so the electric field lines pointed into the cylinder. And with the insulator between we got the equipotentials curving towards the cylinder and the electric field lines curving around it. I know that inside a conductor the electric field is zero, so does that mean on the edge is zero as well, so that's why the electric field lines hit the edge perpendicular? but i don't really know why that happens with the insulator, is it just because electric field cannot go through an insulator so it 'bends' around the cylinder? Any help or direction you can give me will be greatly appreciated. Thanks.