1. The problem statement, all variables and given/known data http://i33.photobucket.com/albums/d86/warnexus/emf_zpsbff89890.jpg 2. Relevant equations Current = (emf)/(resistance) Capacitance = (Charge)/(voltage) Stored energy = (Capacitance)(Volt ^ 2) /(2) 3. The attempt at a solution I need to find current and resistance so I can find emf. capacitance = (charge)/(volt) stored energy = (charge(voltage)/(2) 25 J (2) /(3C) = 50/3 voltage is 50/3 or 17 V.