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K2-61. Thomson's Coil
Purpose
A number of demonstrations involving concepts in magnetic induction.
Equipment
Thomson's coil with acessories.
Suggestions
This experiment is fairly complicated. Read about it in detail before attempting to explain it to your class.
Images
Description
Several induction experiments are possible with this device: (1) JUMPING RINGS: Placing a ring over the extended primary coil core and switching it on causes the ring to jump. A smaller ring will jump higher. Cool the ring in liquid nitrogen to get a really great jump, but be careful about hitting the rear projection screen. Broken metal rings and wooden rings are unaffected. (2) RESISTIVE HEATING: Verify that there is resistive heating in the secondary ring by having a student hold it down until it gets too hot to touch! (3) A light bulb on a small coil lights up when the coil is moved over t
References
Harvey E. White and Hans Weltin, Electromagnetic Levitator, AJP 31, 925-929 (1963). E. J. Churchill and J. D. Noble, A Demonstration of Lenz' Law?, AJP 39, 285-287, (1971).
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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