Magnetic Circuits part 2

Part 2 of the analysis of magnetic circuits.
This video concludes with the graphical method and the analytical method of analysis. The B-H curve is modeled with a Hyperbolic tangent function.

[ulfhaller]

George,
I'm impressed. Crystal clear explanation and outstanding performance.
Thanks.
/Ulf

[gentlyschannel]

George.. I've listened to you in various chats, your understanding of electric, electromagnetism and the physics involved, to me, is honestly awe inspiring! When I hear you talk I realise just how much I don't know.. and I considered myself fairly well read.
Do you think it would be possible to pass some of your knowledge on through your videos in a theory only basis?
You see I have next to no ability to do math, or for that matter, work with numbers in any way.. but theory, now theory is one thing I have no problems with. The way you describe things in hangouts is exactly how I need it presented to me, but can't find it presented anywhere on the internet without math being it's major component.

[kamon]

Hi George! Do you have a video on calculating the magnetomotive force in a magnetic circuit? I know you have to just integrate and its easy if nothing is moving. But I have a problem with a air gap getting bigger over time (so one part of a u-core is moving) and I have to calculate the force dependant on the displacement of the u-core. Does that make any sense?