5H25.20 - Jumping Magnets

Code Number:
Demo Title:
Jumping Magnets
Magnets in a Coil
Area of Study:
Electricity & Magnetism
A Coil and a spring and magnets assembly from the 5K10.48 "Current Coupled Pendula" demonstration box, Lambda Power Supply.
  • Connect the coil to the power supply.  Position the coil vertically and center the spring and magnet oscillator so that it fits into the coil without rubbing.  Lower the magnet assembly so that two of the magnets are inside the coil.  Set the power supply at 5 Volts.  When you turn on the power supply the magnets will be drawn into the coil.  Reverse the leads on the power supply and the magnets will now bounce clear out of the coil.   

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.