1. The problem statement, all variables and given/known data A -10.0nC charge is located at position (x, y) = (2.0cm, 1.0cm) . At what (x, y) position(s) is the electric field - 225,000i N/C? 2. Relevant equations E = (Kq/r^2)*r(hat) 3. The attempt at a solution r = sqrt(Kq/E) = .02m = 2cm So coordinates are (0,-2) I tried putting this answer into mastering physics online and it says it is incorrect. I can't seem to find what I have done wrong. Any help please?