Oersted

Wohler is generally credited with having isolated the metal in 1827, although an impure form was prepared by Oersted two years earlier. In 1807, Davy proposed the name aluminum for the metal, undiscovered at that time, and later agreed to change it to aluminum. Shortly thereafter, the name aluminum was adopted to conform with the "ium" ending of most elements, and this spelling is now in use elsewhere in the world. 

Next refer to the normal magnetization eurves and seleet a value of H (magnetizing foree, oersteds (Oe)) that is below the point on the eurves where the permeability starts to drop due to the saturation of the eore material. From the ehart in figure 3-22 a value of 20 Oe is a good value. Choosing a permeability of 60 yields a reasonably low value of flux density. 

In 1820 Hans Christian Oersted discovered electromagnetism. A report of Oersted s work was delivered before a sceptical meeting of the Academic dcs Sciences held on September 4, 1820. Oersted s work was contrary to established ideas, based on Coulomb s work of the 1780s, that there could not be any interaction between electricity and magnetism. Ampere however, immediately accepted Oersted s discovery, and set to work, reading his first paper on the subject to the Academie on September 18, 1820. 

See also Faraday, Michael Oersted, Hans Christian. 

Several electrical scientists in the early part of the nineteenth century, influenced at least in part by their understanding of German natiirplnlosophie, expected forces of nature to be intimately connected to each other, and some of them spent extraordinary amounts of time looking for the relationship. One of these was a Dane, Hans Christian Oersted, who, after an exhaustive series of experiments, in 1820 found that electricity could indeed produce a magnetic effect. Further experiments by Michael Faraday demonstrated, in 1821, that by proper orientation of an electric current and a magnetic field it was possible to produce continuous motion in what soon would be called a motor. It took an additional ten frustrating years for him to prove what he instinctively felt to be true, that, in a fashion inverse to what... 

Oersted had discovered, magnetism somehow could produce electricity. He called his device an electromagnetic generator. 

The early development of electric motors and generators can be traced to the 1820 discovery by Hans Christian Oersted that electricity in motion generates a magnetic field. Oersted proved the long-suspected... 

See also Batteries Capital Investment Decisions Consumption Economically Efficient Energy Choices Electricity Electric Power, Generation of Faraday, Michael Fuel Cells Fuel Cell Vehicles Magnetism and Magnets Oersted, Hans Christian Tesla, Nikola. 

Faraday returned to chemisti y, but after 1830, his investigations again concentrated on electric and magnetic phenomena. He had become convinced that the reverse action to the phenomenon discovered by Oersted was also possible, that a magnetic... 

See also Electric Motor Systems Electric Power, Generation of Magnetism and Magnets Oersted, Hans Christian. 

In 1819, Hans Christian Oersted, professor of physics at Copenhagen University, discovered that a magnet experiences a force when in the vicinity of a wire carrying an electric current. The fact that the magnet experiences a force is evidence that the electric current produces a magnetic field, which eventually led to the development of innumerable devices— electric motors, electric generators, speakers for In-... 

See also Ampere, Andre-Marie Clausius, Rudolf Julius Emmanuel Electricity Electricity, History of Faraday, Michael Gibbs, Josiah Willard Magnetism and Magnets Molecular Energy Oersted, Hans Christian Thomson, William. 

In 1794 Oersted and his brother Anders matriculated at the University of Copenhagen. Hans studied the sciences, and Anders, who eventually became a leading jurist and a minister of state, studied law. The... 

After this initial discovery. Oersted waited three months, apparently for the construction of a more powerful current source. He then carried out sixty experiments to show that the magnetic field due to the current in a wire is circular around the wire. He showed that the effect is independent of the type of wire, and that it is independent of any intervening common materials. Later, he proved that the effect is proportional to the current in the wire. 

Oersted was named a fellow of several learned societies, presented with medals, and awarded cash prizes. At home, Oersted became Denmark s leading citizen. He continued his research, but as an international figure he traveled extensively, became fluent in many languages, and met with the leading scientists of the time. He gave frequent public lectures and became a director of the Royal Polytechnic Institute of Copenhagen. He also had a lifelong interest in literature and, in 1829, he founded a literary journal to which he frequently contributed articles about sci-... 

Oersted had a kindly and sympathetic personality. He had a successful marriage and a large family, hi 1819 he befriended a poor fourteeii-year-old boy who over the years became virtually another member of the Oersted family. The boy, Hans Christian Andersen, was to become the great Danish stoi"yteller. Andersen often referred to himself as little Hans Christian and to Oersted as gi eat Hans Christian. ... 

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