I aced both my tests in Physics 2 / Electricity and Magnetism. It's weird because while I thought the tests were pretty easy, I still think that E&M is conceptually harder than Mechanics. The problem here is that I still doubt my knowledge about what I have learned so far / what concepts the class has covered. Acing the tests only proved to me that I'm a good test taker; not that I actually understand the material in its greatest depth. Anyone else ever do well on tests and still not feel as confident in their understanding of the material?