"Richard Clark" wrote in message
...
A 1M loop in a 1Hz field, Hmm?

That was meant to setup the problem such that the loops is electrically
small and such that only quasi-magnetostatic analysis would be necessary.
In actuality I'm thinking more along the lines of WWVB loop antennas --
60kHz.

Why bother with the complication of shielding?

The idea is that there's a lot of predominently electric field interference
around (60Hz power lines, for ones) and that the shield -- if grounded --
can short out that component of the field and get the loop to respond
primarily to the magnetic field.

---Joel