Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: Batteries

Joseph et. al.

Since you brought up Sherwood and Chabay's book, here's something I'd like
to hear opinion of the list regarding.

page 559 paragraph towards the bottom and I quote: they are discussing a
traditional motional emf problem of a conducting rod sliding on rails
immersed in a uniform magnetic field.

"The magnetic force evB is a non-Coulomb force (references to page 220 and
350). The work done by this force in moving an electron from one end of the
bar to the other is FNC L = evBL. . . ."

FNC = non-coulomb force.
evB is magnitude of (e v_vec cross B_vec)

IMO this is a blunder of a statement. magnetic forces of the ev X B variety
do no mechanical work! Do others read this the same way I do? Have more
recent printings changed the wording? I have first edition first printing.

Joel Rauber

-----Original Message-----
From: Joseph Bellina [mailto:jbellina@SAINTMARYS.EDU]
Sent: Wednesday, February 13, 2002 4:04 PM
To: PHYS-L@lists.nau.edu
Subject: Re: Batteries


This is
not original
with me...read Sherwood and Chabay.

I just don't think there is good evidence to support an electron
transfer model.

cheers,

joe