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Article #603

Re: Jacob's Ladders (was Re: What are those things called...)

#603
From: SCOTT I CHASE
Date: Mon, 03 Aug 1992 18:32
26 lines
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In article <1992Aug03.024735.9267@norfolk.vak12ed.edu>, fculpepp@norfolk.vak12ed.edu (Fred W. Culpepper) writes...
>	Jacob's Ladder will not operate in the normal fashion
>when the two rods are in a horizontal plane.  The arc does
>depend upon the rising heat of the arc.  This can be
>demonstrated with a source of compressed air (Please! from a
>safe distance).  If a jet of air is blown toward the arc, it
>can be made to stand still or even go back down.  If the air
>pressure is high enough it will even "blow-out" the arc and it
>will reform at the base.

I don't know.  This doesn't sound very convincing.  All you have demonstrated
is that if you apply an opposing force to the plasma channel that you can 
get the spark to stand still.  You haven't shown whether the original
force on the plasma was gravitational (hot air rises) or electromagnetic
(v x B on the current).  I have always assumed that it was the hot air 
that did it.  But I am no longer sure.  Someone with a Jacob's Ladder should
just tip it over and see if it still works.

-Scott

--------------------
Scott I. Chase			"The question seems to be of such a character
SICHASE@CSA2.LBL.GOV		that if I should come to life after my death
				and some mathematician were to tell me that it
				had been definitely settled, I think I would
				immediately drop dead again."      - Vandiver
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From: sichase@csa2.lbl.gov (SCOTT I CHASE)
Newsgroups: sci.physics
Subject: Re: Jacob's Ladders (was Re: What are those things called...)
Date: 3 Aug 92 18:32:03 GMT
Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
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