Simulation of Electric Field and Equipotential Surface of Point Charge System with Matlab

According to the principle of potential superposition of point charge system and electric field lines perpendicular to the equipotential surface,combined with graphics capabilities of Matlab,plotted equipotential surface and electric field lines of Point Charge System in the two-dimensional. It takes three point charges as an example,simulated their electric field lines and equipotential surfaces,and analysis and compare the distribution by changing the location and the amount of electric charge,it can play a good role in teaching demonstration.