1. The problem statement, all variables and given/known data So my question is conceptual. I am trying to figure out in what direction an electron will move if it starts between two plates of a parallel plate capacitator. One of the plates is at 0V and the other is at 50V. Also, would placing a dielectric in a charged, isolated capacitator change its voltage but not charge? 3. The attempt at a solution I know the 100 V plate would repel a negative charge. I would think the electron would move towards the 0V plate just because that is the way a capacitator is supposed to work (moving across an electric potential). Is this correct? For the second question, I think charge wouldn't change when adding a dielectric in an isolated capacitator because there would be nowhere for the charge to go. But then the voltage would drop? Can someone verify that I am understanding this correctly?