Iron Filings, Rotating Motor, Magnet Unit, and Power Supply

Code Number: 5G20.47

Demo Title: Amperes Ants

Condition: Excellent

Principle: Magnetic Domains

Area of Study: Electricity & Magnetism

Equipment:

Iron Filings, Rotating Motor and Magnet Unit, Plexiglas Plate with attached Petri Dish, Power Supply.

Procedure:

Center the Petri dish with the iron filings over the rotating magnets. Run the power supply at 6 or 7 volts which should give the magnets a slow rotation rate. The iron filings will clump together in long strands, stand up when the magnet is below them, and march in the opposite direction of the rotating magnets.

References:

R. C. Nicklin, J. G. Lindsay, Jr., T. L. Rokoske, "Amperes Ants", AJP, Vol. 43, #1, Jan. 1975, p. 111.
H. Richard Crane, "How Things Work - Mini-Motors Driven by Waves", TPT, Vol. 32, #6, Sept. 1994, p. 360.

5G20.47a - Amperes Ants

5G20.47b - Amperes Ants

Disclaimer

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5G20.47 - Amperes Ants

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