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André-Marie Ampère (1775 - 1836) was a French physicist, philosopher, scientist and mathematician who made important contributions to the study of electromagnetism.
He was born near Lyon, France in 1775. He was Professor of Analysis at the Polytechnic School of Paris and the Collège de France. In 1814 he was elected a member of the Academy of Sciences. He occupied himself with various branches of human knowledge, leaving important works, especially in the field of physics and mathematics. Starting from the experiments made by the Danish Hans Christian Oersted on the magnetic effect of the electric current, he was able to structure and create the theory that made possible the construction of a large number of electromagnetic devices. In addition, he discovered the laws governing the attraction and repulsion of electric currents among themselves. He devised the galvanometer, invented the first electric telegraph and in collaboration with Arago the electromagnet.
Among his works, left unfinished Essay on the philosophy of science, in which he began the classification of man's knowledge. Posted Recueil d'Observations électro-dynamiques; The Theory of Phenomènes Electro-Dynamiques; Prerequisites of the theory of electronic dynamics; Considerations on the theory of mathematics of the jeu; Essai sur la philosophie des sciences.
In his honor was given the name of ampere (symbol: A) to the unit of measurement of the current intensity.