Hi tide. question. What is the point in using a dielectric. I was doing a problem in the physics book and it showed that when you use a dielectric, the amount of energy stored in your capictor decreases. Wouldent you want to store the MOST amount of energy in your capacitor? So why bother using it. I guess it is only good when you have a FIXED voltage difference at your power supply. In that case, you dont have to worry about voltage going down as you use the dielectric. Therefore your charge increases, and your total stored energy also increases. Is that correct?