See, now I'm more confused.
What you've said makes sense to me, but still doesn't fit with the equations we were using.
To put some context around it, the subject was the magnetic field around a very long current-carrying straight wire.
My thoughts are that, as you move further away, the area of the circle increases with the square of the radius. It's an area that's being magnetised (well, actually a volume, but we'll discount the 3rd dimension - along the length of the wire - for the sake of simplicity), so, as far as I can see, so the field strength ought to fall off with the square of the distance from the wire, yet this is not the case.
where u0 = is the permeability of free space, 4pi * 10^-7
I = current through conductor
d = distance from wire
B = magnetic field strength
Marvin wrote: What a depressingly stupid machine.
GENERATION 95592191 : The first time you see this, copy it into your sig and divide the generation number by 2 if it's even, or multiply it by 3 then add 1 if it's odd. Social experiment.