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Magnetic Field of a Line between two wires

  1. Jul 13, 2017 #1
    1. The problem statement, all variables and given/known data
    Two wires with the same intensity but with opposite directions.
    The magnetic field of the middle line between the two wires is:
    3a8dd7f1ebd62e3272e70dd562a0ac26.png
    a) (X)
    b) (o)
    c) Parallel between the two wires
    d) Null
    e) Non of the above.
    2. Relevant equations
    N/A

    3. The attempt at a solution
    Knowing that they both colide in the middle since the top wire goes (X) on the bottom and (o) at the top, while the bottom wire does the opposite.

    I can't figure if it's Parallel or Null. Can someone explain me which one is the right one? I used the right hand rule.
     
  2. jcsd
  3. Jul 13, 2017 #2

    lightgrav

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    The place they're asking about is below the top current, and above the bottom current.
    Yes, the top current makes B inward (x) there ... what does the bottom current do there?

    btw, it is "same Indicated current" I, but in opposite directions.
     
  4. Jul 13, 2017 #3

    jedishrfu

    Staff: Mentor

  5. Jul 13, 2017 #4

    lightgrav

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    both currents make B there into the page ... can these contributions cancel?
     
  6. Jul 13, 2017 #5
    5e5700b32d17c7352cc8a5e329b5e01d.png
    I did this to understand a little more, They both go to (X)... I was confusing this with wires that go in the same direction.
     
  7. Jul 13, 2017 #6

    jedishrfu

    Staff: Mentor

    So we're good now, right? You figured out your answer.
     
  8. Jul 13, 2017 #7

    lightgrav

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    well, the wires just sit there, not going anywhere ... it it their currents that go left and right.
     
  9. Jul 13, 2017 #8
    Yes, I managed to figure out thanks to you all, Thank you.
     
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