Simple electric field problem.... 1. The problem statement, all variables and given/known data What magnitude charge creates a 4.17 N/C electric field at a point 9.78 m away? 2. Relevant equations 3. The attempt at a solution E = (k * Q) / r^2 Q = (E * r^2) / K = 4.43 x 10^10 C Why isn't that right?