Do Magnetic Fields Exist in All 3 Cases?

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SUMMARY

This discussion centers on the existence of magnetic fields in three scenarios involving electron motion. It is established that a magnetic field is generated in Case 2, where an electron moves within a copper conductor, due to the flow of electric current. In Case 1, an isolated electron moving linearly in space does not produce a magnetic field as it lacks relative motion with respect to other charges. Case 3, involving a neutral ball, does not generate a magnetic field either, as the net charge is zero, despite the ball's molecular structure. The conversation emphasizes the importance of relative motion and charge in the generation of magnetic fields.

PREREQUISITES
  • Understanding of electromagnetic theory
  • Knowledge of electric charge and its properties
  • Familiarity with the concept of relative motion
  • Basic principles of classical mechanics
NEXT STEPS
  • Study the principles of electromagnetism, focusing on Maxwell's equations
  • Explore the relationship between electric fields and magnetic fields in moving charges
  • Investigate the effects of charge polarization in materials
  • Learn about the Lorentz force and its implications in different frames of reference
USEFUL FOR

Physicists, electrical engineers, and students studying electromagnetism or classical mechanics will benefit from this discussion, particularly those interested in the behavior of charges and magnetic fields in various scenarios.

  • #31
in the CRT the magnetic deflection which is used to guide the electron beam is only useful because the electrons are in motion so here we go again , charged particles moving create magnetic fields which can interact with the charged particles that are moving into the wire of the deflection coil and hence the outcome.

even though the more fundamental would be the electric field if we want to get down to the " chicken or egg" debate.
As logically it follows that electric field + motion or increase decrease in field strength = magnetic field.
 

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