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Magnetic Field's Equation's querry.

  1. Oct 18, 2008 #1
    1. The problem statement, all variables and given/known data
    B = (miu0)I / 2(pie)(rho) X an

    how do i know the direction of the an? if it is ax, ay or az?


    2. Relevant equations
     
  2. jcsd
  3. Oct 18, 2008 #2

    Doc Al

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    Staff: Mentor

    Can you restate your question?

    The field from a long straight current-carrying wire is given by:

    [tex]B = \frac{\mu_0 I}{2 \pi r}[/tex]

    Does your question relate to this?
     
  4. Oct 18, 2008 #3
    yes indeed. and besides that equation, there's suppose to be a unit vector, right? i was wondering how do i know the direction of the unit vector.
     
  5. Oct 18, 2008 #4

    Doc Al

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    Staff: Mentor

  6. Oct 18, 2008 #5
    awesome! thanks alot.

    at least something good happened today. haih. i just got robbed.
     
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