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Lee: Your answer below is clear, understood and agreed to by me as
it seems logical.
But, what if the toroid form is the 8" donut with 1/8" thick walls
of polyethylyne (I think - but plastic for sure) filled with liquid,
plugged with nylon plug and sealed with RTV caulking; and then the
outside is wrapped with aluminimum foil.
Is this the same since we have the metal outside or does the fact
that the metal is separated from the liquid by the plastic change
things?
This is of course an attempt to beat the potential problem of
permeability of polyethylene.
Thanks and best regards
Dale
No, a non-magnetic metal may not be used. The toroidal form would
constitute the equivilant of a shorted ring in a transformer so any
field changes inside it would be undetectable outside the toroid.
Good question though.
it seems logical.
But, what if the toroid form is the 8" donut with 1/8" thick walls
of polyethylyne (I think - but plastic for sure) filled with liquid,
plugged with nylon plug and sealed with RTV caulking; and then the
outside is wrapped with aluminimum foil.
Is this the same since we have the metal outside or does the fact
that the metal is separated from the liquid by the plastic change
things?
This is of course an attempt to beat the potential problem of
permeability of polyethylene.
Thanks and best regards
Dale
No, a non-magnetic metal may not be used. The toroidal form would
constitute the equivilant of a shorted ring in a transformer so any
field changes inside it would be undetectable outside the toroid.
Good question though.