Are the directions of charge flow (=current?) absolute?

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The discussion explores how the direction of charge flow, or current, can vary between different inertial observers, using two charged beams as an example. Observer 1 perceives both beams moving in the same direction, while Observers 2 and 3 see them moving in opposite directions, highlighting the relativity of motion. The conversation delves into the interplay between electric and magnetic forces, questioning whether they act against or together with each other depending on the observer's frame. It emphasizes that the apparent charge density of the beams changes with relative speed, affecting the observed forces. Ultimately, the discussion illustrates the complexity of electromagnetic interactions and the significance of the observer's frame in understanding these phenomena.
  • #51
DaleSpam said:
Sure, if you want to call the change of momentum of the field a force then you could certainly say that. It is not common, but I have no problem with it. It seems that you now understand the point I have been making since post 43.

It's not common? Really?

EM fields are regarded as mediators of momentum, but you say they are usually not regarded carriers of force. Contrarily, what I read about EM implies that the EM field consists of force. In fact, EM is one of the "fundamental forces" known to physics.

The definition of force is quite clear from Newton's formulation. If a system has momentum being exchanged, then there is force.
 
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  • #52
kmarinas86 said:
It's not common? Really?
Really, really.
 
  • #53
Closing this thread because it has drifted away from the original topic. Kmarinas86, please feel free to open a new thread if you wish on the topic of Newton's third law in the context of electromagnetism.
 

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