Lenz's Law Demonstrator - MG-8600



Drop a mass through the 1.5 meter tube. It takes about half a second to drop. Then drop a magnet with an identical mass. It takes over 10 times as long to fall.


  • 1.5 m Tube
  • Non-magnetic mass
  • Magnetic mass
  • Spring scale
  • How It Works

    As the magnet falls, it generates a current in the walls of the tube, moving in one direction above the magnet and in the opposite direction below the magnet. Both currents obey Lenz's Law and induce magnetic fields that oppose the motion of the magnet.


    Tube Length
    • 1.5 m