Forces between to permanent magnets

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SUMMARY

The discussion centers on the forces between two permanent magnets and the potential impact of introducing a weak, long air-core electromagnet between them. The inverse cube relationship indicates that the force diminishes significantly with distance, leading to negligible attraction at larger separations. Participants concluded that while an electromagnet may not effectively direct magnetic flux between the two permanent magnets, a long piece of iron could enhance the magnetic interaction by providing a path for the magnetic field lines.

PREREQUISITES
  • Understanding of magnetic field strength
  • Familiarity with the inverse cube law in magnetism
  • Knowledge of magnetic flux and field lines
  • Basic principles of electromagnetism
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willyd
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Forces between two permanent magnets

I am new to the concept of magnetic field strength and the behavior of field lines etc, so please correct me if any of my thinking is incorrect.

I want to increase the force between two permanent magnets that are at a distance apart. At the moment due to the inverse cube relationship approximation with distance the calculated force between the magnets is almost negligible. I was wondering what would happen if I placed a weak, long electro magnet (air core) in-between the two permanent magnets.

Could the electro magnet work to direct magnetic flux from one magnet to another?

Would this act to amplify the force between the two permanent magnets?

Any insight appreciated
 
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