Consider four 8 · µC charges placed at the corners of a square, which is 2.1 ·m on a side. The charges on the top are both positive, and the charges on the bottom are both negative.
(a) Find the electric field at the center of the square.
Evec = N/C xhat + N/C yhat
(b)Find the electric field at the midpoint of the left side.
Evec = N/C xhat + N/C yhat