Quote Originally Posted by Clinton1
Bob, if you plucked all that out of your brain then I'm impressed. Good stuff.
Nah, it's all part of my day job. I set this as an exercise for my first year students a couple of years ago. I was also surprised at the result I then went and did some actual measurements and sure enough there agreed very well with the theory. I should remind everyone that the coil size I am referring to is tightly wound, like those you buy cable on. The magnetic heating effect is not as dramatic for loosely wound large diameter coils