[TowerTalk] iron pipe "lightning chokes"

[Gene Smar]

TT:

----- Original Message ----- 
From: "Jim Lux" <jimlux at earthlink.net>
To: "Jim Brown" <jim at audiosystemsgroup.com>; <towertalk at contesting.com>
Sent: Thursday, February 03, 2005 8:44 AM
Subject: Re: [TowerTalk] iron pipe "lightning chokes"


>
> ----- Original Message -----
> From: "Jim Brown" <jim at audiosystemsgroup.com>
> To: <towertalk at contesting.com>
> Sent: Wednesday, February 02, 2005 10:23 PM
> Subject: Re: [TowerTalk] iron pipe "lightning chokes"
>
>
> > On Wed, 2 Feb 2005 22:26:42 -0500, Jim Jarvis wrote:
> >

>
> I think the problem is very similar to the classic lab demo of eddy
current
> braking.  You have a conductive tube and drop a magnet through it.  The
> magnet takes much longer to fall through the tube than it would the
> equivalent distance in free air, so energy is being dissipated as heat in
> the tube.
>

This phenomenon illustrates Lenz's Law:
http://www.launc.tased.edu.au/online/sciences/physics/Lenz%27s.html .  FWIW.

73 de
Gene Smar  AD3F


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