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(Writing the “Book of Nature” in the language of mathematics: Ampère's law)

This paper reviews the deduction of Ampère's law as made by Ampère himself, and following the same sequence of steps. We indicate the principles on which the law is founded. The expression of the law is the result of an interaction between experiment, and Ampère's skills to account for facts in the language of mathematics.

Keywords:
Ampère's law; electric current; force between two circuits; history of physics


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