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Re: EM Induction - A conceptual question



At 5:47 PM -0400 on 4/16/02, John S. Denker wrote
Chuck Britton wrote:

I choose an amperian loop to be a rectangle, one side within
the field and parallel to the field, opposite side, parallel to the
first but in the field free region, and the two connecting sides at
right angles to the field????

> How much current passes through this loop? It SEEMS to be a problem!

If this isn't the answer, please clarify the question.

ok. I am considering a totally STATIC situation. (A MAJOR shift in
calculations!)

And my question concerns CURRENT that is wrapped enclosed by an
amperian loop. The line integral of B around this loop is s'possed to
equal the current passing through the loop.

THIS consideration makes me scratch my head in responce to:

>The original question described a piecewise-uniform B-field.
>Uniform in one area and zero in another. There's nothing
>mutually-exclusive or inconsistent or unphysical about this.

the line integral of B around the given (amperian) loop is NOT zero
but there is also NO current 'penetrating' the loop!
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Chuck Britton Education is what is left when
britton@ncssm.edu you have forgotten everything
North Carolina School of Science & Math you learned in school.
(919) 286-3366 x224 Albert Einstein, 1936