3A70.50 - Oscillating Magnets

Code Number:
Demo Title:
Oscillating Magnets
Potential to Kinetic Energy, Simple Harmonic Motion
Area of Study:

Pin one of the magnet pendulums against an iron rod.  Set the other pendulum in motion which should continue for quite some time.  

The rotating oscillating magnets will transfer energy back an forth when you start one spinning.  You can also pin one of the so that it does not spin when doing the demo.  

  • J. Pierrus and M. M. Michaelis, "From Our Files: Demonstration of Coupled Oscillations Using Permanent Magnets", TPT, Vol. 18, #1, Jan 1980, p. 39, reprinted in TPT, Vol. 39, #8, Nov. 2001, p. 511.
  • Joseph L. Snider, "Simple Demonstration of Coupled Oscillations", AJP, Vol. 56, #3, Mar. 1988, p. 200.
  • Robert Ehrlich, "9.7, A Magnetic Oscillator", Why Toast Lands Jelly-Side Down, p. 153. 


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