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4 sides of the wire can produce a B-field

  1. Apr 11, 2013 #1
    http://upload.lsforum.net/users/public/m28175Untitledw43.jpg

    Q 21 why the is not downward?? it gains weight!!

    Q22 why the direction is not out of paper, by right hand grip rule, 4 sides of the wire can produce a B-field which is out of paper!!?
     
  2. jcsd
  3. Apr 11, 2013 #2

    rude man

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    The wire runs into/out of page. Calculate i L x B.
    i L x B again. This time, solve for B.

    What forces are exerted on AB and CD? On BC?

    Don't be concerned with the direction of the B fields generated by the wire. Use the formula!
     
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