1. The problem statement, all variables and given/known data Find the charge and current distributions for V(r,t)=0 A(r,t) = -1/(4*pi*epsilon) q*t/r^2 r-hat 2. Relevant equations We know E=1/(a*pi*epsilon) q/r^2 rhat B = 0 3. The attempt at a solution What formula do I use? We know grad x B = mu*J +mu*epsilon dE/dt Would this suffice to solve for J? What about rho?