Learning kinda follows the Pareto principle, and kinda doesn’t. Additionally, by sheer non-luck, you often do need the stuff you happen to learn.

Electric Motor Design, plus stuff
Learning kinda follows the Pareto principle, and kinda doesn’t. Additionally, by sheer non-luck, you often do need the stuff you happen to learn.
Current supply is commonly used in finite element analysis of electrical machines. Almost as commonly, that’s the wrong solution.