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Homework Help: Study of Magnetic Fields

  1. Mar 13, 2010 #1
    1. The problem statement, all variables and given/known data
    suppose a bar magnet is brought near a magnetic needle in a way that does not disturb the latter's position in the magnetic meridian. What can be said concerning the direction of the field due to the magnet?

    2. Would reversing the position of the magnet has any effects on the neutral points? and what would a stronger magnet affect the positoin of the neutral ponit.

    3.explain why a dip needle point down rather than horizontal as does a compass needle. why does a compass needle not indicate a dip angle?
    4. Does the dip needle give any indication of the relative magnitudes of the horizontal and vertical components of the earth's magnetic field in your locality? explain, using vectors. The angle we got from dip needle was 23.
    2. Relevant equations

    3. The attempt at a solution

    1)I think there won't be direction change, that the bar magnet would be in alignment with the magnet needle. but I'm not sure.
    2)Reversing the magnet position, there would still be neutral points, and there won't be any change to the position. It would all be the same. But if a stronger magnet is used instead, then the neutral point would be closer to the center of the bar magnet, since it would take more force from earth magnetic field to cancel out the magnetic field of the stronger one than the weaker one. But the change would be insignificant, since earth's magnetic field is so much stronger than the magnet bars.
    3) I have no clue...
    4) no clue....

    again I'm not sure about my attempts "answers"
    Last edited: Mar 13, 2010
  2. jcsd
  3. Mar 14, 2010 #2
    bump... no one knows?
  4. Mar 15, 2010 #3
    bump bump bump......
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