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K2-43. Lenz's Law - Permanent Magnet And Coils
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HomeK. Electromagnetic PrinciplesK2. Electromagnetic InductionK2-43. Lenz's Law - Permanent Magnet And Coils
K2-43. Lenz's Law - Permanent Magnet And Coils
Purpose
To demonstrate Lenz's law in a simple and direct way.
Equipment
Stand with one-turn and five-turn coils, horseshoe magnet.
Images
Description
Thrust one pole of a strong horseshoe magnet into a coil, or quickly withdraw it from inside the coil. A current is induced in the coil that opposes the motion of the magnet, and the reaction force on the coil results in the coil being either pushed or pulled in the same direction that the magnet was moved. Disconnect the hook for the single turn coil. No current can flow so no force is created.
References
Thomas D. Miner, Lenz's Law Demonstration, TPT 6, 427 (1968). Don Kangas and Haym Kruglak, Lenz's Law Demonstration, TPT 27, 50 (1989).
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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
-
See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves
-
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
Physics Lab Demos