Question: Point charges q1 = +2.00 (mu)C and q2 = -2.00 (mu)C are placed at adjacent corners of a square for which the length of each side is 1.00 cm. Point a is at the center of the square, and point b is at the empty corner closest to q2. Take the electric potential to be zero at a distance far from both charges.
Part A) What is the electric potential at point a due to q1 and q2?
Part B) What is the electric potential at point b?
Part C) A point charge q3 = -4.00 (mu)C moves from point a to point b. How much work is done on q3 by the electric force exerted by q1 and q2?