sci.physics.electromag

Paul wrote:


> Unfortunately, the cage is this case will
> be a conducting chassis, which will enclose the
> digital compass. This will be a portable device,
> which the user will walk around with.

> It won't be a super-conducting shell,
> so the eddy currents will dissipate as heat. Hopefully
> the effect will be somewhat transient, but the fact
> that the compass itself is sensitive enough to
> measure the earth's magnetic field, means that
> it just may be sensitive enough to pick up distortions
> to the field due to the motions of the user, even
> if those motions are relatively slow.

A simple test would be to put the compass with and without the cage
on a turntable and spin it; note any difference.


--
Jim Pennino

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