In this first Crash Course lesson, I’m explaining why most electronics education is backwards—and how I think you should actually learn it if you want to be industry-ready. In university we usually start with resistors, capacitors, and Ohm’s Law, but that’s like learning grammar before understanding language. The real foundation is the electromagnetic field. Once you understand the field, everything else—R, L, C, impedance, signal integrity—starts to click into place. I anchor the whole discussion in something practical: the printed circuit board. When you look at a PCB motherboard with length-matched routes, odd angles, and “weird” patterns, there’s a reason for it. The key is the PCB cross-section: copper layers plus dielectric layers. The big reveal is this: the copper doesn’t “carry the power” in the way people think—the electromagnetic field carries the energy, and most of that energy lives in the dielectric. Copper mainly guides the field. From there, I lay out the roadmap: field propagation, inductance, capacitance, phase relationships through time, characteristic impedance, termination methods, return paths/ground management, and then common PCB design mistakes. If you only follow rules of thumb, your thinking stays rigid; if you understand EM theory, you can make trade-offs when rules conflict—exactly what top interviewers care about.