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Electromagnetism: Turning effect of coil

  1. Mar 10, 2007 #1
    1. The problem statement, all variables and given/known data
    This is a question about turning effect on a current-carrying coil lying between the poles of a magnet.
    Please refer to the following link:
    http://img11.picsplace.to/img.php?file=img10/22/N1_000.gif
    On the textbook, it is stated the turning effect on the coil can be increased by increasing the area of the coil (inside the magetic field).
    I understand the force would increase if AB and CD increases.
    But I'm not sure whether the turning effect will increase when BC increases. :uhh:
    Can anyone tell me?

    Thank in advance.

    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 10, 2007 #2
    The force acting on a current-carrying conductor could be calculated with the following formula:

    [tex]F = BIl\sin\alpha[/tex]

    where B is magnetic induction, I is current, l is length of the conductor and <alpha> is the angle between the conductor and the magnetic field (the vector B). The angle between the conductor BC and the magnetic field is 0<pi> - the answer is thus apparent.
     
    Last edited: Mar 10, 2007
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