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Transcript of Georg Ohm
http://www.corrosion-doctors.org/Biographies/OhmBio.htm By Easter of 1811 Ohm was back at the University of Erlangen, where on 25 October, after having passed the required examinations, he received the Ph.D. He subsequently taught mathematics for three semesters as a Privatdozent, his only university affiliation until near the end of his life. Lack of money and the poor prospects for advancement at Erlangen forced Ohm to seek other employment from the Bavarian government; but the best he could obtain was a post as a teacher of mathematics and physics at the low-prestige, poorly attended Realschule in Bamberg, where he worked with great dissatisfaction from January 1813 until the school’s dissolution on 17 February 1816. Ohm’s law is the mathematical relationship among electric current, resistance and voltage. The principle is named after the German scientist Georg Simon Ohm. Ohm demonstrated that there are no "perfect" electrical conductors through a series of experiments in 1825. Every conductor he tested offered some level of resistance. These experiments led to Ohm’s law. Ohm’s law of 1826 states that if the given temperature remains constant, the current flowing through certain conductors is proportional to the potential difference (voltage) across it. In other words, current equals voltage divided by resistance. Random Fact: Georg Ohm has a crater on the moon named after him. On 11 September 1817 Ohm had been offered the position of Oberlehrer of mathematics and physics at the recently reformed Jesuit Gymnasium at Cologne, and he began work there (evidently) sometime before the end of the year. The ideals of wissenschaftliche Bildung had infused the school with enthusiasm for learning and teaching; and this atmosphere—which appears later to have waned—coupled with the requirement that he teach physics and the existence of a well-equipped laboratory, stimulated Ohm to concern himself for the first time avidly with physics. Not wishing to return to Cologne, Ohm formally severed his connections there in March 1828 and accepted a temporary job to teach three recitation classes of mathematics a week at the Allgemeine Kriegsschule in Berlin. Sometime during 1832 he also took on a class at the Vereinigte Artillerie- und Ingenieurschule there. Continuing to find all higher academic doors closed to him in Prussia, Ohm hoped to have better luck in Bavajob that brought him no improvement over his previous circumstances except the desirable title of professor. Finally Ohm began to receive belated official recognition of the importance of his earlier work: he became a corresponding member of the Berlin and Turin academies, and on 30 November 1841 he received the Royal Society’s Copley Medal. He became a full member of the Bavarian Academy in 1845 and was called to Munich. on 23 November 1849 to be curator of the Academy’s physical cabinet, with the obligation to lecture at the University of Munich as a full professor. He did not receive the chair of physics until I October 1852, less than two years before his death. Ohm’s law stated that the amount of steady current through a material is directly proportional to the voltage across the material, for some fixed temperature:
I = V/R
Ohm had discovered the distribution of electromotive force in an electrical circuit, and had established a definite relationship connecting resistance, electromotive force and current strength. Date of birth: March 16, 1787 Date of Death: July 7th,1854