1. The problem statement, all variables and given/known data Point charges +q and -q are placed at +50 cm and -50 cm on the x-axis, respectively. Is the electric field at the origin (halfway between the charges) zero or nonzero? If nonzero, which direction does it point? 2. Relevant equations 3. The attempt at a solution If they were like charges, both positive, then I would say the electric field would be 0. I'm not sure because they are opposite polarities. Please help.