1. The problem statement, all variables and given/known data At a given instant, a 3.8 A current flows in the wires connected to a parallel-plate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.76 cm on a side? 2. Relevant equations 3. The attempt at a solution I don't really know where to start... Could you use the change in length=perm of free space(I +E(sub o)*Change in E) ? I don't know if this is even an equation..