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Is this a valid equation for determining electromagnetic force?

  1. Apr 2, 2012 #1
    I have been searching the internet for a simplistic equation which is capable of calculating the force of an electromagnet. I think I have found one at http://www.ehow.com/how_5969962_calculate-force-electromagnet.html however am not entirely sure this is a correct equation (don't really trust Ehow...). Another reason I don't trust the equation is that the Biot-Savart Law is an equation I know which determines the force of a magnetic field produced by an electromanget and this equation appears nothing like that... So is this a valid equation?

    Thanks,
    Z.C.
     
  2. jcsd
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