1. The problem statement, all variables and given/known data Four positive charges are located on the corners of a square of side-length a. The charges are A=4, B=2, C=8 4q----a----q |------------| a-----------a |------------| 2q----a----8q Determine the magnitude and direction of the electric field experienced by charge q in terms of q, a, and ke. 2. Relevant equations Ex = [q1*q2/(4*∏*εo*a^2)]cosθ Ey = [q1*q2/(4*∏*εo*a^2)]sinθ 3. The attempt at a solution Ex = 4keq2/a^2 + 2keq2/[(2a2)^.5]cos45 Ey = [2keq2/(a*21/2)]sin45 + 8keq2/a2 I know I have to sum up the x components from A->q and B->q for the x component of the vector, and then sum up the y components from B ->q and C->q for the y component and then use the pythagorean theorum to find the magnitude. For the direction I have to take the tangent of the y-component/x-component. I am just confused because there aren't any values given. Would the above be correct?