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K2-42. Lenz's Law - Magnet In Aluminum Tube
Purpose
To demonstrate Lenz's law dramatically.
Equipment
Two linear magnet arrays, aluminum rod, mounted six-foot aluminum tube with magnet catcher.
Images
Description
This is a commercial device purchased from Pasco Scientific. Two arrays of magnets, containing five strong disc magnets each with small aluminum spacers between the magnets, are dropped through a vertical aluminum tube. One set,having its poles North-to-South, has very little external field, and falls very quickly through the tube. The other set, having its poles arranged North-to-North, then South-to South, etc, has a large external field. As it falls it induces large currents in the aluminum tube. According to Lenz's law, these currents interact with the falling magnet array so as to oppose
References
Jhules A. M. Clack and Terrance P. Toepler, Magnetic Induction Experiment, TPT 28, 236-238, (1990).
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See pagesk1. forces on moving charges
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See pagesk2. electromagnetic induction
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See pagesk3. transformers
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See pagesk4. motors & generators
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See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
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See pagesk7. rlc circuits
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See pagesk8. electromagnetic waves
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See pagesk1. forces on moving charges
-
See pagesk2. electromagnetic induction
-
See pagesk3. transformers
-
See pagesk4. motors & generators
-
See pagesk5. electrical properties of matter
-
See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves