I'm currently taking Calculus-based Physics II, an introductory to electromagnetism. While I'm working hard to understand the material as deeply and intuitively as possible, I wonder how much of the material will be useful later on? I am seeing a bunch of concepts such as electric potential V, potential energy U, electric flux, capacitance etc. but how much of what I am being introduced to will help in my understanding of future classes such as electrodynamics or quantum mechanics? How useful is it to learn everything introduced as intuitively as possible?