Magnetic field due to electron?

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Discussion Overview

The discussion revolves around the nature of magnetic fields produced by moving charges, specifically focusing on how the magnetic field depends on the relative motion between the charge and the observer. The scope includes conceptual understanding and potential implications in the context of special relativity.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants assert that a magnetic field is produced only when a charge is in motion relative to an observer.
  • One participant questions the meaning of "how," seeking clarification on the nature of the magnetic field in relation to the charge's motion.
  • Another participant emphasizes that magnetic fields depend on "current," which is defined by the motion of charge, suggesting this is fundamental to understanding the question.
  • A later reply highlights that the observation of a magnetic field is contingent on the relative velocity between the observer and the charge, providing examples to illustrate this point.
  • One participant expresses frustration over the lack of clarity in the original question and indicates a willingness to disengage from the discussion due to insufficient information provided.

Areas of Agreement / Disagreement

Participants generally agree that the magnetic field is related to the relative motion of the charge and the observer, but there is no consensus on the specifics of how this relationship operates or on the clarity of the original inquiry.

Contextual Notes

There are unresolved questions regarding the participants' familiarity with Maxwell's equations and the level of understanding of special relativity necessary to fully grasp the concepts being discussed.

rahaverhma
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When a charge is rest w.r.t me no magnetic field is produced but when it moves w.r.t me then there exists a magnetic field, how?
 
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rahaverhma said:
When a charge is rest w.r.t me no magnetic field is produced but when it moves w.r.t me then there exists a magnetic field, how?

What do you mean by "how"?

Are you asking for how the charge can move? Or are you asking for a description of the magnetic field for when the charge move? Have you looked at Maxwell equations?

Zz.
 
I actually want to know that if magnetic field depends on the relative motion of charge
w. r. t observer and then how?
 
rahaverhma said:
I actually want to know that if magnetic field depends on the relative motion of charge
w. r. t observer and then how?

Magnetic fields depends on "current", which, by definition, is the motion of charge. So that should tell you already about the first part of your question.

I have no idea what you mean by "how", which was what I asked previously, and you didn't answer. You also didn't answer if you're familiar with Maxwell equations. Without such help (you really have not provided sufficient information), there's no way to tell you want you want to know.

I also think I'm done with this because I don't have the patience to keep prodding for more info, especially when they went unanswered. Maybe someone else here will help you.

Zz.
 
More of a relative movement question I believe.
1) You are sitting still and an electron moves by you, you observe a magnetic field
2) You and the electron are moving - you observe no magnetic field...

In short it does depend on the RELATIVE velocity of the observer and charge. Answering the why.. how much do you know and how much time do you have to learn special relativity.

Found this video some time ago, I can not vouch for it's accuracy - but it is just a basic review, was good enough for my BE level understanding.
 
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