The left-hand side of this snippet of a screenshot comes courtesy of
The Grainger College of Engineering:
ECE 330 – Power Circuits and Electromechanics.
According to AI, the equation taught to most engineers is lacking in one additional factor which injects voltage into the system if the mutual induction should vary. Here is an example of how conventional magnetics is taught which I found online:
Because of this, gainful amplification due to parametric variation of mutual inductance could be wrongfully blamed on "free energy" when, in reality, its cause is due to our ignorance both among lay persons and among professionally trained engineers.
AI taught me this after I simulated an ARV propulsion system's power supply according to Mark McCandlish and a few other sources independent of him.