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Please hel with Mastering Physics, very lost in magnetism

  1. Mar 10, 2015 #1
    1. The problem statement, all variables and given/known data
    A long wire carrying a 6.0A current perpendicular to the xy-plane intersects the x-axis at x=−2.0cm. A second, parallel wire carrying a 3.5Acurrent intersects the x-axis atx=+2.0cm.

    At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
    Express your answer using two significant figures.

    At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?

    I am not sure how to get started

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Mar 10, 2015 #2
    nvr mind i solved it :)
     
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