Question: in the figure the four particles form a square of...
In the figure, the four particles form a square of edge length a = 3.78 cm and have charges q1 = +10.0 nC, q2 = -20.0 nC, q3 = +20.0 nC and q4 = -10.0 nC.
a. In vector notation, What net electric field do the particles produce at the square's center?
b. what is the magnitude of the electric field in kN/C