Lawrence force - no work?

  • Thread starter fawk3s
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  • #1
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Main Question or Discussion Point

As I was reading it in my textbook for a single particle, it made a lot of sense. But when I started thinking about the electric motor, it confused me, because it is Lawrence force which makes the rotor spin, right?
I have a couple of ideas, but I thought I'd ask here.

Thanks in advance,
fawk3s
 

Answers and Replies

  • #2
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Actually, I think I just figured it out, was too hasty to post. So I think there's no need to reply.
 
  • #3
Born2bwire
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Well, just for clarification, I believe you are talking about the Lorentz Force. But yes, the Lorentz Force is the only interaction that an electromagnetic field makes on currents and charges in classical electrodynamics. You do not need to use it explicitly (for example we often find the force by taking the gradient of the energy density of the field) and it is often hidden away inside of Maxwell's Equations (for example Faraday's Law) but if the electromagnetic field exerts a force, it is done so via Lorentz in some manner.
 

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