Will the current in the wire attract each other

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SUMMARY

The discussion centers on whether currents in a single wire will attract each other. It concludes that in a cable with a finite cross-section and no net charge, the electron density may be slightly higher in the interior due to magnetic fields. However, this increase in electron density results in repulsion that effectively cancels out the magnetic forces at realistic current flows. The calculated effects are minimal and do not lead to significant attraction between the currents.

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  • Understanding of basic electromagnetism principles
  • Familiarity with current flow in conductors
  • Knowledge of electron density and its effects
  • Concept of magnetic fields and forces
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  • Research the effects of magnetic fields on electron density in conductors
  • Explore the principles of electromagnetic repulsion and attraction
  • Study the behavior of currents in various conductor geometries
  • Investigate advanced topics in electromagnetism, such as Maxwell's equations
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Physics students, electrical engineers, and anyone interested in the behavior of currents and electromagnetic interactions in conductors.

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I wonder whether the current in a single wire will attract each other?
Eventually shrink to a line?
 
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In which way?
If you consider a current in a cable with finite cross-section and no net charge, electron density might be a big higher in the interior due to magnetic fields. I think I calculated that once, and the result was very small for realistic current flows. A higher electron density adds repulsion, which cancels the magnetic forces soon.
 

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