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Re: [Phys-l] Magnetic force and work

Savinainen Antti asked:
Would a
magnetic field which changes with respect to position do work on a moving test charge?

No.

It is trivial to prove this. The force is perpendicular to the
velocity in accordance with the Lorentz force law. The power
(rate of work) is force dot velocity. That's all there is to it.