The electric motor uses the principle of the force acting on a conductor in a magnetic field (which is different from the magnetic effect of electric current, and the current ninth grade physics edition clearly separates the two). It was discovered by Danish physicist Oster, born on August 14, 1777, in a family of pharmacists in Rudjobin, Langeland. In 1794, he was admitted to the University of Copenhagen and obtained a doctoral degree in 1799. From 1801 to 1803, he visited Germany, France and other countries and met many physicists and chemists. From 1806, he served as a professor of physics at the University of Copenhagen, and from 1815, he became the executive secretary of the Royal Danish Society. In 1820, he was awarded the Copley Medal by the Royal Society of England for his outstanding discovery of the current magnetic effect.
Auster served as the Dean of the Copenhagen Institute of Technology from 1829. He passed away on March 9, 1851 in Copenhagen. He has conducted extensive research on physics, chemistry, and philosophy. Due to the influence of Kantian philosophy and Schelling's natural philosophy, I firmly believe that natural forces can be transformed into each other, and have been exploring the connection between electricity and magnetism for a long time. In April 1820, the effect of electric current on magnetic needles, known as the magnetic effect of electric current, was finally discovered. On July 21 of the same year, he published his discovery under the title of "Experiments on the Electric Conflict Effect on Magnetic Needles". This short paper caused a great shock in the European physics community, leading to the emergence of a large number of experimental results, thus opening up a new field of physics - electromagnetics.
