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Magnetism Help

  1. Apr 3, 2008 #1
    Magnetism!!! Help!!!

    can someone please explain the hand rule thing to me....i am dead lost when teacher is explaining it. All i know is that your thumb is N and the bottom of your hand is S...please help!!!
  2. jcsd
  3. Apr 3, 2008 #2
    Err, your thumb points in the direction of positive current, and your fingers curl in the direction of the magnetic field.
  4. Apr 3, 2008 #3
    what about finding the direction of induced current?
  5. Apr 3, 2008 #4
    Whatever change in magnetic flux there is, the induced current will make a magnetic field to counter that change in flux.
  6. Apr 3, 2008 #5
    i mean using the hand rule...how do i do it?
  7. Apr 3, 2008 #6
    Curl your fingers around a wire and point your thumb in the direction of current. Then curl your fingers around the wire in a way that you're opposing the change in flux. Your thumb will be in the direction of the induced current.
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