Re: Experiment - Displacement Current's Magnetic Fields

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Paul Nicholson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <paul-at-abelian.demon.co.uk>

Hi Terry,

> ...I am looking for are terribly obvious flaws

Look up the generalised Ampere's circuital law, aka the Maxwell-Ampere
law.  That's the one that JCM invented by hypothesising the dD/dt term
as a source for H.  The one you're trying to test.  An hours thought
will save a weeks work.

Now read up on why he did that.  Would Ampere's law make any sense
without the dD/dt term?  No, because it would give two different
values for the voltage induced in your coil.  One value if you
integrate Curl H over a surface which cuts a feedwire to your cap,
another value if you integrate over a surface which goes through the
cap's gap.  Thus Ampere's law would not be self consistent. 

Yet Ampere's law works (it is an empirical law), and the search coil
will give a reading consistent with both Curl H = J  *and*
Curl H = dD/dt.  Whatever voltage appears on your search coil, you
will not be able to tell whether it came from the J due to the wires
leading to the cap, or from the dD/dt in the gap.  The two sources
will give exactly the same value.

Your experiment will fail, and the dD/dt was added to Ampere's law in
order to explain this failure.

To test dD/dt, you must look for a property of the field which
vanishes altogether if Curl H = J + dD/dt were not a correct
description of nature.
--
Paul Nicholson
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