1. The problem statement, all variables and given/known data Negative charge -Q is distributed uniformly around a quarter-circle of radius a that lies in the first quadrant, with the center of curvature at the origin. Find the x- and y-components of the net electric field at the origin. 2. Relevant equations V = ∫kdQ/r Eradial = -dV/dr 3. The attempt at a solution V = ∫kdQ/r = -kQ/r Eradial = -dV/dr = -(d/dr)(-kQ/r) = kQ(d/dr)(1/r) = kQ(-1/r2) = -kQ/r2 = -kQ/a2. I don't know how to find the x- and y-components after solving for the magnitude.