André-Marie Ampère was born on 20 January 1775 in Lyon. A French physicist and mathematician, Ampere is regarded as one of the founders of electromagnetism, which he called electrodynamics. After learning of Oersted's discovery that an electric current deflects a magnetic needle, he showed within weeks that parallel wires carrying current attract or repel each other, and he formulated the mathematical law that describes magnetic force from currents. He also proposed that magnetism arises from tiny circulating currents. The SI unit of electric current, the ampere, is named in his honor.
Before and after
- 1774Discovery of manganese
- 21 July 1774Treaty of Küçük Kaynarca
- 1 August 1774Priestley isolates oxygen
- 5 September 1774Birth of Caspar David Friedrich
- 20 January 1775Birth of André-Marie Ampère
- from 19 April 1775 to 3 September 1783American Revolutionary War
- 19 April 1775Battles of Lexington and Concord
- from 19 April 1775 to 17 March 1776Siege of Boston
- 23 April 1775Birth of J. M. W. Turner
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The era
This moment belongs to the Industrial era (1760 CE to 1914 CE), steam, factories and revolutions. You can also browse everything in the 18th century.