1. The problem statement, all variables and given/known data Three charges are on the x~axis about five cm apart. Charge A is three micro C, charge B is negative four micro C, and charge C is five micro C. What is the effect on B? 2. Relevant equations I have no idea how to solve this or the formula involved. 3. The attempt at a solution Completely clueless, just would like to know how to solve it.