I recently realised that didn't know the formula for the effect of one
magnetic field on another magnetic field source.

I now imagine that this is not the simple concept I originally believed it
to be.  Really what I'm looking at to start with is a formula for say, the
force that a solenoid of field B1 exerts on another solenoid of field B2
with a radius of separation of R in a one-dimensional system.

Initially, I expected something along the lines of the law of universal
gravitation, but I still haven't been able to find confirmation of this,
and furthermore, I found two conflicting sources, one claiming that the
relationship is inverse square, and the other that it is inverse fourth.

Anyway, I was hoping that someone on this list might have some idea what
the relationship is for the one dimensional case.  I am, of course,
interested in the two and three dimensional cases, but those I expect to be
far more complex.

--Brendan

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