Re: TC Secondary Currents - was ( Experimental Help - Terry?)

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Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Jim,

You experiments were what I was thinking of....  I guess I have to keep
thinking...  Apparently this little confirmation of displacement currents
is a real messy subject!  We may reach a dead end on this one where we have
a question that we cannot answer by experiment.

Richard's simple challenge of displacement currents seems to have caught us
without being able to provide experimental evidence.  There is yet another
frontier to explore in this but I am grasping for the simple way out...

Thanks for keeping me from wasting time on a dead end...

Cheers,

	Terry
 

At 07:21 AM 3/6/2002 -0800, you wrote:
>Oddly, some 25 years ago, I attempted to do just this measurement in high
>school after I found out about Maxwell's equations... I had a capacitor
>which was charged by a Wimshurst machine, with a magnetic probe in the field
>(multiple iron wires forming a core, and a sense coil on the core, feeding
>an amplifier and oscilloscope with a camera)  Never got any unequivocal
>results, and I was just looking for some sort of qualitative result... (move
>the probe around in various orientations and positions, and the detected B
>field should change in some nice repeatable fashion...)
>
>The real problem is that c^2 proportionality constant.  It takes a HUGE
>change in electric field going very fast (in my case, a spark gap discharged
>the cap) to produce a very small magnetic field, which is tough to detect in
>the presence of all that changing E field.
>
>
>