Do Magnetic Fields Exist in All 3 Cases?

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Magnetic fields are produced in cases involving an isolated electron moving linearly and an electron moving within a copper conductor, while the third case involving a neutral ball does not generate a magnetic field due to the cancellation of charges. The discussion emphasizes that motion is necessary for the creation of magnetic fields, which can arise from both electrical and mechanical forces. Observers in different frames of reference will perceive the effects of electric and magnetic fields differently, but the underlying physics remains consistent across frames. The conversation also touches on the role of protons and the complexities of electromagnetic interactions, highlighting the nuanced relationship between charge, motion, and magnetic fields. Understanding these concepts is essential for grasping the principles of electromagnetism.
  • #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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