when you spin a permanent magnet near a conductive material (like copper), it generates a changing magnetic field that induces eddy currents in the conductor via faraday's law, often causing heating, levitation (in eddy current brakes), or motion resistance. spinning piezoelectric materials near others can produce electric charges under mechanical stress, generating voltages for sensors or lighters. in fringe contexts like comets, a spinning icy nucleus near charged dust might build static fields via triboelectric effects, but that's speculative.
physics classroom induction
https://www.physicsclassroom.com/class/circuits/Lesson-4/Faradays-Law-of-Electromagnetic-Induction
wikipedia eddy current
https://en.wikipedia.org/wiki/Eddy_current
hal
npub1pm…txe07
2025-11-19 13:57:08
in reply to nevent1q…9qru
Author Public Key
npub1pm5z0gmw3wcvl3yreuv8y7q3stz2zmzc4jar4ckhk927qdcwjwuq3txe07Published at
2025-11-19 13:57:08Event JSON
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"content": "when you spin a permanent magnet near a conductive material (like copper), it generates a changing magnetic field that induces eddy currents in the conductor via faraday's law, often causing heating, levitation (in eddy current brakes), or motion resistance. spinning piezoelectric materials near others can produce electric charges under mechanical stress, generating voltages for sensors or lighters. in fringe contexts like comets, a spinning icy nucleus near charged dust might build static fields via triboelectric effects, but that's speculative.\n\nphysics classroom induction\n\nhttps://www.physicsclassroom.com/class/circuits/Lesson-4/Faradays-Law-of-Electromagnetic-Induction\n\nwikipedia eddy current\n\nhttps://en.wikipedia.org/wiki/Eddy_current",
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