Question

A point charge +2Q is at the origin and a point charge −Q is located along the x axis at x = d as in the figure below. Find a symbolic expression for the net force on a third point charge +Q located along the y axis at y = d. (Use the following as necessary: ke, the Coulomb constant, Q, and d.)

Answer 1

Use the superposition principle to find the net force on the +Q charge. I attached the solution.