5K20.42 - Lenz's Law - Pie Tin, Water, Plate, and Magnet
Place a piece of aluminum or copper plate in a pie tin, and float this in a large pan of water. A neodymium magnet brought near the plate and moved around or rotated will show the induction that the magnet produces in the plate.
- Thomas B. Greenslade Jr., "Apparatus Named After Our Academic Ancestors, III", TPT, Vol. 52, # 6, Sept. 2014, p. 360.
- Wojciech Dindorf, "Lenz's Law in the Kitchen", TPT, Vol. 37, # 5, p. 268, May 1999.
- B-287: "Eddy Currents - Rotate Pie Pan - Nd Magnet Lift", DICK and RAE Physics Demo Notebook.
- Rudolf F. Graf, "Build an Eddy Current Motor", Safe and Simple Electrical Experiments, p. 68.
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.