🎬Visualize the electric field lines and the resulting surface forces between the attractive and repul

The animated demo clearly illustrates the crucial link between the electric field geometry on the boundary surface and the resulting nature of the surface force. The field's reaction is always the opposite of the charges' interaction, serving to mediate the total force. This is determined by how the field lines cross the boundary: For Attractive Charges, Field lines pass perpendicularly through the midplane. This configuration creates Maxwell Pressure, pushing the field regions away from each other. For Repulsive Charges, Field lines run parallel to the midplane. This configuration creates Maxwell Tension, pulling the field regions toward each other. In both static cases, the mechanical stress generated by the field at the boundary perfectly counteracts the force the nearest charge exerts on the field, maintaining static equilibrium.

Surface Force for Two Equal Charges | Proof and Derivationviadean on Notion