In daily electromechanical operations, we often listen to the importance of predecessors, so do you understand the origin of it?
Electric motor: It uses the principle of magnetic effect of current. The invention of this principle is the Danish physicist Oster.
Born in August 14th, 1777, he was born to a pharmacist family in Rudchobin, Langen Island. He was admitted to the University of Copenhagen in 1794 and received his Ph.D. in 1799. From 1801 to 1803, he visited Germany, France and other countries and met many physicists and chemists. He has been a professor of physics at the University of Copenhagen since 1806 and a permanent secretary of the Royal Society of Denmark since 1815. In 1820, he was awarded the Copley Medal by the Royal Society for his outstanding discovery of current magnetic effects.
He has done research on physics, chemistry and philosophy. Influenced by Kant's philosophy and Schelling's natural philosophy, it is believed that the forces of nature can be transformed into each other and explore the connection between electricity and magnetism for a long time. In April 1820, the effect of current on the magnetic needle, the magnetic effect of the current, was finally discovered.
On July 21 of the same year, he published his findings on the topic "Experiment on the role of magnetic needles in power conflicts." This short essay has caused great shock to the European physics community, leading to the emergence of a large number of experimental results, thus opening up a new field of physics - electromagnetics.
In 1812 he first proposed the idea of ​​the connection between light and electromagnetics. In 1822 he conducted an experimental study on the compressibility of liquids and gases. Aluminum was extracted in 1825, but the purity was not high. In acoustic research, he tried to discover the electrical phenomena caused by sound. His last research work was diamagnetic. He is a teacher who is passionate about research and experimentation. He said: "I don't like the boring lectures without experimentation. All scientific research starts from the experiment."
Oster is also a distinguished speaker and natural science universal worker. In 1824, he initiated the establishment of the Danish Science Promotion Association and created the first physical laboratory in Denmark. In 1908, the Danish Association for the Advancement of Natural Science established the "Oster Medal" to recognize physicists who made significant contributions. In 1934, the unit of magnetic field strength in the CGS unit system was named "Oster".
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