Re: [Phys-l] Magnetic force and work

[John Mallinckrodt <ajm@csupomona.edu>]

Joel wrote:

> John, I'm interpreting what you said (above as well as in what I
> snipped), as meaning that in dB/dt != 0 cases, as a matter of principle,
> that it is the induced electric fields that do the work, not the
> magnetic field.  (in the classical world described above).
>
> Correct me if I'm wrong.

That's what I'd say, but I can certainly imagine cases in which it 
might be easier to think about and/or calculate the work done in 
terms of dB/dt.

--
John "Slo" Mallinckrodt

Professor of Physics, Cal Poly Pomona
<http://www.csupomona.edu/~ajm>

and

Lead Guitarist, Out-Laws of Physics
<http://www.csupomona.edu/~hsleff/OoPs.html>