1. The problem statement, all variables and given/known data Calculate electric field between two electrodes - one square and one circular. Dimensions of the electrodes are given (diameter a and length of the square side b) as well as their potentials. The square electrode is placed inside the circular one. The student should identify the areas with the highest field value and present plots of the field intensity and of the potential. The accuracy of the solution must be verified. The solution should be performed for at least three different sizes of square grid. 2. Relevant equations This is the task I have to do in Scilab. As I have absolutely nothing in common with Physics, please give me any hint. I would appreciate it. Please do not assume that something is obvious for me and explain as to a little kid :) 3. The attempt at a solution After the research I think I should solve two Laplace equations (in polar and cartesian coordinates) and then sum the results, but I am not sure about that.