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Magnetic Effect of Current

  1. Aug 1, 2015 #1
    In Oersted's Experiment, when a compass needle was placed parallel to the wire, then deflection was observed. why was this not observed when the compass needle was perpendicular?
     
  2. jcsd
  3. Aug 1, 2015 #2
  4. Aug 2, 2015 #3

    Gaz

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    Because it deflects the compass to a perpendicular position. If it is already perpendicular it would already be facing the direction of the deflection and would not change.

     
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