This is also informative on the history of electric and magnetic fields:

https://www.youtube.com/watch?v=X42HsZC3B58

The transcript is here: https://kathylovesphysics.com/magnetic-fields-physics.../

#faraday #maxwell #electromagnetictheory

#onthisday in 1831: Michael Faraday discovered electromagnetic induction using his now famous iron ring experiment, which is shown in the figure below (or left).

What Faraday discovered was that induction was due to the change in the magnetic flux that occurred when the battery was connected and disconnected. He explained induction using a concept that he called "lines of force" [1,2].

Sadly, the scientists of the day widely rejected Faraday's ideas, mainly it seems because they were not formulated mathematically. An important exception was James Clerk Maxwell, who used Faraday's ideas as the basis of his quantitative electromagnetic theory [3].

#faraday #maxwell #electromagnetictheory

References
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[1] "Faraday's law of induction", https://en.wikipedia.org/wiki/Faraday's_law_of_induction

[2] "Basics of induction", https://www.testandmeasurementtips.com/basics-of-induction/

[3] "James Clerk Maxwell", https://mathshistory.st-andrews.ac.uk/Biographies/Maxwell/