1. The problem statement, all variables and given/known data On the x axis, charge +Q lies at x = -a and charge -Q lies at x = +a. Point P lies on the axis at x = +b, where b > a. a) Work out the electric field magnitude of P b) What is the direction of this …field? 2. Relevant equations E=kqr/r3 3. The attempt at a solution E=2kQa/(b2-a2) + 2kQa/(b2-a2)= Ep=4kQab/(b^2 - a^2)^2. My teacher said that the solution was correct, however my work was not. For b, I determined the direction to be to the right towards the negative charge. I would appreciate any assistance.