Hi guys, I have a small pet project at the moment and I'm trying to look at eddy current losses in transformers. Whilst researching my project I realised that my AC current, when applied to the coil (wrapped around the steel core), would be subject to an inductive reactance. Is it correct in believing that my intrinsic inductance L = NBA/I would then change because the applied current is constantly changing? How would I observe how my inductance changing with time? I assumed it would be something along the lines of taking I = I0sin(wt) and therefore L = NBA/I0sin(wt) My physics is rusty and my power electronics is non evident, so if someone could clear up my misconceptions it would be great.