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Homework Help: Magnetic Field Question

  1. Mar 25, 2007 #1

    Emily6

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    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
     
    Emily6, Mar 25, 2007
  2. jcsd
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  3. Mar 25, 2007 #2

    robb_

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    Have you learned of anything that produces a magnetic field?
     
    robb_, Mar 25, 2007
  4. Mar 25, 2007 #3

    Emily6

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    Such as the earth and electric current?
     
    Emily6, Mar 25, 2007
  5. Mar 25, 2007 #4

    robb_

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    Yes, good.
    An electric current is what again and might we find that in matter somehow? (I am leaving this vague for now)
     
    robb_, Mar 25, 2007
  6. Mar 25, 2007 #5

    Emily6

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    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?
     
    Emily6, Mar 25, 2007
  7. Mar 25, 2007 #6

    robb_

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    Okay.
    Take a simplified view of the atom. Is there any current associated with this picture?
     
    robb_, Mar 25, 2007
  8. Mar 25, 2007 #7

    Emily6

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    There can be if it has a charge?
     
    Emily6, Mar 25, 2007
  9. Mar 25, 2007 #8

    robb_

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    Well, what is an atom composed of? Think of maybe the Bohr model, ie. no need for full on quantum here.
     
    robb_, Mar 25, 2007
  10. Mar 25, 2007 #9

    Emily6

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    It is composed of protons, neutrons, electrons. Is charged atomic particles the answer to this question?
     
    Emily6, Mar 25, 2007
  11. Mar 25, 2007 #10

    robb_

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    What about those electrons? Do they have motion about the nucleus?
     
    robb_, Mar 25, 2007
  12. Mar 25, 2007 #11

    Emily6

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    Yes they move around the nucleus.
     
    Emily6, Mar 25, 2007
  13. Mar 25, 2007 #12

    robb_

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    Do electrons have charge?
     
    robb_, Mar 25, 2007
  14. Mar 25, 2007 #13

    Emily6

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    Yes they have a negative charge.
     
    Emily6, Mar 25, 2007
  15. Mar 25, 2007 #14

    robb_

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    So you have a charge moving, is that a current?
     
    robb_, Mar 25, 2007
  16. Mar 25, 2007 #15

    Emily6

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    Yes it is a current.
     
    Emily6, Mar 25, 2007
  17. Mar 25, 2007 #16

    robb_

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    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."
     
    robb_, Mar 25, 2007
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