sci.physics.electromag

Wimpie wrote:
[big snip]
> Hope this helps a bit.

Thanks, it does a lot.

A bit of explanation about the other half of my question. I'm thinking of a
fluxgate-type device here, where it's possible to measure the background
field by seeing how much flux you have to apply before the core goes into
saturation. They're pulsed at a fairly low frequency (say 10KHz) and I was
wondering what the upper limit was set by - is that because of
inductance/capacitance of the device (let's assume linearity isn't
important)? Ignoring that (assume the core is in some strong
preexisting AC field), what controls how quickly a core can go in and out of
saturation? Or is it not possible to get to this situation and other EM
effects take over?

Theo