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A color photo of the wrapped iron ring that Michael Faraday used to demonstrate induction. It is loosely wrapped by today's standards, and the insulation looks like some sort of cotton or fibrous paper that is starting to come apart in places.

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https://files.mastodon.social/media_attachments/files/110/973/327/353/531/218/original/3737f0a028bba281.jpeg

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  1. Robert McNees (mcnees@mastodon.social)'s status on Tuesday, 29-Aug-2023 14:16:41 UTC Robert McNees Robert McNees

    Michael Faraday first demonstrated the phenomenon of electromagnetic induction #OTD in 1831.

    He coiled insulated wire around two sides of an iron ring, then observed a brief current in one as he connected the other to a battery.

    Image: The Royal Institution, Paul Wilkinson

    In conversation about a year ago from mastodon.social permalink
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