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Re: [Phys-l] Magnetic force and work



Hi!

John replied to Joel:

"You presumably have not proved that "magnetic forces do no work",
because that's not true.

More likely, you proved that a _static_ magnetic field does no
work on a _test charge_.

1) If the field is in any way time-dependent, all bets are off."

I can see that. What about the case when the magnetic field is
not time dependent but depends only on position? Would a
magnetic field which changes with respect to position do work on
a moving test charge?

Cheers,

Antti

Antti Savinainen, Ph.D., B.Ed.
Senior Lecturer in Physics and Mathematics
Kuopio Lyseo High School
Finland
E-mail: <antti.savinainen@kuopio.fi>
Website: <http://kotisivu.mtv3.fi/physics/>


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