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Homework Help: Charges in magnetic field

  1. Apr 18, 2016 #1
    1. The problem statement, all variables and given/known data

    Hi! How does a charged particle spiral around a magnetic field lines? Is it because the overal magnetic field interracts with the individual magnetic field of the particle? For example if a piece of metal is put inside magnetic field, the electrons will interract with the field and line up with it. Maybe the same process causes them to spiral around a magnetic field line in plasma?
    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 18, 2016 #2


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    No. It ineracts directly with the particle: the Lorentz force
    The component of the particle velocity that is perpendicular to the B field causes an acceleration that results in a circular trajecetory
    The component of the particle velocity that is parallel to the B field is unaffected: if it is zero the particle moves in a circle, if it is non-zero the particle moves in a spiral.
  4. Apr 18, 2016 #3
    Ok, thank you! I think i understand now
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