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I Magnetic field due to electron?

  1. Apr 9, 2017 #1
    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?
     
  2. jcsd
  3. Apr 9, 2017 #2

    ZapperZ

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    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.
     
  4. Apr 13, 2017 #3
    I actually want to know that if magnetic field depends on the relative motion of charge
    w. r. t observer and then how?
     
  5. Apr 13, 2017 #4

    ZapperZ

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    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.
     
  6. Apr 13, 2017 #5
    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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