Re: induced emf again

[Rick Tarara <rtarara@SAINTMARYS.EDU>]

----- Original Message -----
From: "Joseph Bellina" <jbellina@saintmarys.edu>
To: <PHYS-L@lists.nau.edu>
Sent: Tuesday, April 30, 2002 1:12 PM
Subject: Re: induced emf again


> Since the rod is moving at constant velocity, the net field in the metal
> would be zero.  The only way to get that is to allow a charge
> distribution to occur which would cancel the induced field.  It
> certainly wouldn't be just charges at the end, since the induced field
> is constant, and the field due to the charges would, in the extreme be 1
> over r squared.
> Anyway, thats the way I imagine it.
Me too, sort of.  I can imagine a thick rod where the end charges take on a
planar distribution and then the two ends look like charged cylindrical
plates and the field can be fairly uniform.   In a long, thin rod, then one
gets Joe's version.

Rick