PIRA 5K20.30 - Eddy Currents: Jumping Ring
Photo Shows the Demo Used by the University of Texas at Austin.
Instructions / Notes:
- Two aluminum rings, one with a thin slit cut out and other being solid all the way around, are place around the core a large coil.
- With a ring in place, turn on the switch. The solid ring made of aluminum will fly off. Cool it with LN2 and it will fly higher.
- You may want a student to try to hold the solid ring down.
- The ring with a slit cut out of it does nothing. A brass ring can be made to levitate.
- This demo is also referred to as Thompson's Jumping Ring.
Last Updated 3/99 - University of Texas at Austin Physics Dept.
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