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Homework Help: E&M Current Carrying Loop in B-field.

  1. Mar 9, 2009 #1
    1. The problem statement, all variables and given/known data
    Suppose that the magnetic field in some region has the form B=kz[tex]\hat{x}[/tex] (k constant). Find the force on a square loop (side a) , lying in the yz plane and centered at origin if it carries current I flowing counterclockwise, when you look down the x-axis.

    2. Relevant equations

    3. The attempt at a solution

    I understand how to work out the math, its just that "look down the x-axis" tidbit at the end. when it says you're looking DOWN the x-axis, does that mean standing on the negative end looking down the positive, or vice-versa, cause that's quite important for the problem.
  2. jcsd
  3. Mar 9, 2009 #2


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    It means that if you were standing at x=+infinity and looking towards the origin, you'd see the current going counterclockwise.
  4. Mar 9, 2009 #3
    Thanks!!! That's what my "gut feeling" told me, but it seemed odd for some reason
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