1. A positive point charge q₁ = +2.00 µC is fixed in position at the A center of a square of side a = 10.0 cm, as in the figure.

A second point charge q2 is fixed to either corner B, corner C, or corner D. The net electric field at corner A is zero. (a) At which corner is the second charge located? (b) Is the second charge positive or negative? (c) What is the magnitude of this second charge? (d) What is the electric potential at corner A? A third charge qo = +3.00 µC is now placed at corner A of the square. (e) What is the net force exerted on this charge? (f) What is the potential energy of charge qo? (g) What is the potential energy of the system of three charges? D +9₁ 2 B C a