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What gives rise to a magnetic moment in a proton/neutron?

  1. Mar 30, 2016 #1
    1. The problem statement, all variables and given/known data
    Describe, with examples, what is meant by magnetic moment. What gives rise to a magnetic moment in a proton/neutron?

    2. Relevant equations

    3. The attempt at a solution
    I know what a magnetic moment is, just struggling with the other parts of the question.
    So what I'm thinking is that an electron orbiting generates a magnetic moment since it is a charged particle moving in a circle. In the same way the spin of a nucleus generates a magnetic moment since the nucleus is comprised of charged quarks which are spinning when the proton/neutron is spinning. Is this correct?
     
  2. jcsd
  3. Mar 30, 2016 #2

    Orodruin

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    No, it is not correct. Your view of how things work is way too classical. Why do you think an electron has a magnetic moment? (It is a point particle.)
     
  4. Mar 30, 2016 #3
    Electron generates a magnetic field when it travels in a circle (I x A)
     
  5. Mar 30, 2016 #4
    Also how would a magnetic moment be generated in a neutron/proton, is it just be because of the spin that it has or is it just some inherent property that we have learnt to accept but no answer
     
  6. Mar 30, 2016 #5

    Orodruin

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    No, even a stationary electron has a magnetic moment.
     
  7. Mar 30, 2016 #6
    I think I'm sort of getting it spin is just something that elementary particles have. It is intrinsic to them and anything charged with a spin/angular momentum will have a magnetic moment.
     
  8. Mar 30, 2016 #7

    Orodruin

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    Even uncharged particles can have an intrinsic magnetic moment, but yes, it is a property of the elementary particle. Just as elementary particles have mass or charge, they in general have an intrinsic angular momentum and magnetic moment.
     
  9. Mar 30, 2016 #8

    epenguin

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    The question was about a proton or neutron, not electron.
     
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