Code Number: 8B40.50

Demo Title: Magnetic Field Coupling

Condition: Excellent

Principle: Magnetic Field Coupling

Area of Study: Stellar Astronomy

Equipment:

Pyrex dish, Lycopodium powder, tennis ball.

Procedure:

Place the tennis ball on the bench and spin it observing that the ball spins for a long period of time. Place the dish with the Lycopodium powder and water on an overhead projector. Then position the ball above the dish with water and Lycopodium powder and spin it and allow it to drop into the dish. Notice that the ball drags a layer of water around with it and slows down fairly quickly.

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.

Instructional Resources and Lecture Demonstrations

8B40.50 - Magnetic Field Coupling

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