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Homework Help: Magnetic Field Question

  1. Mar 25, 2007 #1
    1. The problem statement, all variables and given/known data
    What is the underlying basis of the magnetic field in a magnetized piece of iron?

    3. The attempt at a solution

    I have absolutely no clue what this problem is asking or how to go about answering it.

    Thanks in advance
  2. jcsd
  3. Mar 25, 2007 #2
    Have you learned of anything that produces a magnetic field?
  4. Mar 25, 2007 #3
    Such as the earth and electric current?
  5. Mar 25, 2007 #4
    Yes, good.
    An electric current is what again and might we find that in matter somehow? (I am leaving this vague for now)
  6. Mar 25, 2007 #5
    Electric current is the rate of charge flow through a given point. I think we can find electric current in matter because there can be charges acting upon each other?
  7. Mar 25, 2007 #6
    Take a simplified view of the atom. Is there any current associated with this picture?
  8. Mar 25, 2007 #7
    There can be if it has a charge?
  9. Mar 25, 2007 #8
    Well, what is an atom composed of? Think of maybe the Bohr model, ie. no need for full on quantum here.
  10. Mar 25, 2007 #9
    It is composed of protons, neutrons, electrons. Is charged atomic particles the answer to this question?
  11. Mar 25, 2007 #10
    What about those electrons? Do they have motion about the nucleus?
  12. Mar 25, 2007 #11
    Yes they move around the nucleus.
  13. Mar 25, 2007 #12
    Do electrons have charge?
  14. Mar 25, 2007 #13
    Yes they have a negative charge.
  15. Mar 25, 2007 #14
    So you have a charge moving, is that a current?
  16. Mar 25, 2007 #15
    Yes it is a current.
  17. Mar 25, 2007 #16
    Nice! Now you may want to flush this out further by considering the motion (orbit) of the electron and what the field would look like from this one "atom."
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