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Right hand rule - Magnetic field

  1. Feb 25, 2014 #1
    1. The problem statement, all variables and given/known data

    Conventional current flows in a ring in the direction indicated in the diagram (if you stand at location A, on the +x axis, and look toward the ring, current flows clockwise). At each of the locations labeled by a letter, use the right hand rule to find the direction of the magnetic field at that location, due to the current in the ring.

    18-079-ring_field_6locs_sym.jpg

    2. Relevant equations

    Right hand rule

    3. The attempt at a solution

    I already know the answers, which was given to me:

    Location A = -x
    Location B = +x
    Location C = -x
    Location D = +x
    Location E = +x
    Location F = +x

    But I don't know how to apply the right hand rule to find the direction of the magnetic field? Can anyone explain it to me thoroughly, please?
     
  2. jcsd
  3. Feb 25, 2014 #2
    It's just like any other cross product. AxB
    Step 1: You put your open palm with your fingers pointing in the same direction as the first vector A ( in your example it is I)
    Step 2: Without moving anything but your fingers, point to the direction of the point whose magnetic field you examine.
    Step 3: The magnetic field at this point is given by the direction of your extended thumb without moving your hand.
    Watch this too:
     
    Last edited by a moderator: Sep 25, 2014
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