Hi, I'm trying to get my head around electric field propagation in an electric circuit. If you have a battery with no circuit I imagine the electric field between the terminals would look like the magnetic field lines between the two poles of a magnet. What I can't visualize is what the field lines look like when you add an open circuit and slowly close it. What does the field look like when it is nearly closed and when it is fully closed ? Does it only propagate when the circuit is fully closed ?