Suppose you have the 9.47\mu F capacitor of a heart defibrillator at a potential difference of 7.54\times 104V . - Part (a) ✔ What is the energy, in joules, stored in it the capacitor? U = 26919 U = 2.692\times 104 J ✔ Correct! Part (b) What charge, in millicoulombs, is stored on the capacitor.