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Homework Help: Two Simple Magnetism Questions

  1. Jul 28, 2013 #1
    1. The problem statement, all variables and given/known data
    Please see attachments.

    2. Relevant equations

    3. The attempt at a solution
    F1 - F2 = FT = 5*10^-5
    Second one no clue.

    Attached Files:

  2. jcsd
  3. Jul 28, 2013 #2
    And why is the current in this one clockwise as viewed from the top?

    Attached Files:

  4. Jul 28, 2013 #3
    I think the answer to qn 4 is the current in the loop will flow in such a direction that the magnetic field produced by it will oppose the magnetic field of the magnet (law of conservation of energy). Hence, clockwise.
  5. Jul 28, 2013 #4
    For the first one, the current will flow in such a direction that the magnetic field produced by that current will oppose the motion of the loop to the right by applying a force to the left
  6. Jul 28, 2013 #5
    But inside the loop the magnetic field would be the other way.
  7. Jul 28, 2013 #6
    Yup. Basically it tries to stay in it's original state of rest and oppose change.
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