• A carbon rod aligns itself with the magnetic field.
  • Poles should be ~5 cm apart.
  • A video camera may be needed in a large classroom
  • CAUTION: keep magnets at least 30 cm away from ALL other ferromagnetic materials.


  • A glass rod turns perpendicular to the magnetic field.
  • Poles should be ~2.5 cm apart.



        (suspend both rods from opposite ends of a long dowel on an aluminum stand)
        (may need black background for video camera)

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