Two 2.00-C point charges are located on the x axis. One is at x = 1.00 m,

Question:

Two 2.00-μC point charges are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 m.
(a) Determine the electric field on the y axis at y = 0.500 m.
(b) Calculate the electric force on a -3.00-μC charge placed on the y axis at y = 0.500 m.