Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Science Challenge: Prove these magnets won't move

  1. Apr 8, 2008 #1
    1) An electromagnet with north up
    2) A paddle
    3) A permanent magnet (magnet A) positioned north down on top of the left side of the paddle
    4) A permanent magnet (magnet B) positioned south down on underneath of the right side of the paddle

    Reasoning) If the electromagnet is turned on from the position seen in the video - http://www.youtube.com/watch?v=YHHab4c4hsk", magnet A will rise and magnet B will fall due to the laws of magnetic repulsion and attraction. When the paddle turns over 180 degrees, magnet A will be where magnet B was and magnet B will be where magnet A was.

    Additional information) The magnetic field lines of the two magnets feed into each other, creating what is called, in some engineering circles, a "magnetic circuit".
    Last edited by a moderator: Apr 23, 2017
  2. jcsd
  3. May 6, 2008 #2
    This video has been removed by the user.

    or else I just can't find it. :(
  4. May 10, 2008 #3
    Div B = 0 Proof!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook