- Two semi-infinite grounded conducting planes meet at right angles. In the region between them, there is a point charge q, situated as shown in figure below. (a) Set up the image configuration, and calculate the electric potential in this region. What charges do you need, and where should they be located? (b) What is the force on q? (c) How much work did it take to bring the charge q from infinity? (d) Suppose the planes met as some angle other than /2. Would you still be able to solve the problem by the method of images? If not, for what particular angles does the method work? Hints. (a) How many image charges do you need to reproduce the boundary conditions? (d) Where must not be the image charges placed? (3+1+1+2 points) I here V = 0 a