1827, ohm published "mathematical exposition of galvani circuit", which proved ohm's law in theory. Ohm thought that the research results would be recognized by academic circles and invited him to teach. But he was wrong. The publication of this book attracted a lot of satire and slander, and the university professor looked down on him as a middle school teacher. Bauer, a German, attacked him and said, "People who look at the world with pious eyes should not read this book, because it is simply incredible deception, and its only purpose is to desecrate the dignity of nature." All this made Ohm very sad. In a letter to a friend, he wrote: "The birth of galvanic circuit brought me great pain. I really complain that it is untimely, because people living in the imperial court have little knowledge and can't understand the true feelings of its mother. "

Of course, many people are wronged by Ohm. Schveger, editor-in-chief of the Journal of Chemistry and Physics, who published Ohm's paper, wrote to Ohm: "Please believe that the light of truth behind the dark clouds and dust will eventually be transmitted and dispersed with a smile." Ohm resigned from his post in Cologne and worked as a private school teacher for several years. It was not until seven or eight years later, with the progress of circuit research, people gradually realized the importance of ohm's law, and ohm's reputation was greatly improved. 184 1 year, he was awarded the copley medal by the Royal Society; 1842, he was hired as a foreign member; 1845, he was accepted as an academician of the Bavarian Academy of Sciences. In memory of him, the unit of resistance "ohm" was named after his surname.

Further experiments led to the law named after him. Later, he dealt with his experimental work mathematically and theoretically, and wrote a book "galvani Circuit-Mathematical Research" (published in 1827).

Georg Simonohm (1787 ~ 1854), a German physicist, was born in Herun, Bavaria in March, 1987. His father is a skilled locksmith who is interested in science and has a good understanding of philosophy and mathematics. Influenced and educated by his father, he was very interested in mathematics and mastered some metalworking skills, which created good conditions for his later study and research. 18 1 1 Graduated from Herun Gen University, with a doctor of philosophy, and taught in secondary schools in Herun Gen and Banbao successively; 18 17 published the first geometry textbook; 18 17 ~ 1826 teaches mathematics and physics in the preparatory course of cologne university; 1826 ~ 1833 works in Berlin Military Academy; 1833, employed as professor of physics at Nuremberg Institute of Technology. 184 1 was awarded the copley medal by the royal society, and 1842 was accepted as a foreign member of the royal society. 1845 is the courtyard of Bavarian Academy of Sciences; 1849 is a non-permanent professor at the university of Munich, and 1852 is a full professor at the university. 1854 died in Munich on July 6th.

Ohm's most important contribution is to establish the law of circuit. He studied his law under the influence of Fourier heat conduction theory (the heat flux between two points in a heat conducting rod is proportional to the temperature difference between the two points). At that time, there was no clear concept of electromotive force, current intensity and even resistance, and a suitable galvanometer was also being explored. He used thermoelectric batteries and torsion scales, and after many experiments and inductive calculations, he succeeded. 1825 published the first paper "Preliminary Expression of the Law of Conductive Contact Electricity of Metal", which discussed the relationship between the electromagnetic force attenuation of current and the length of wire. In addition, he measured the conductivity of different metals through experiments. In the process of making wires, he directly benefited from his father's exquisite skills. P barlow, a British scholar, found that the current is the same in all parts of the whole circuit. This result inspired Ohm to think that the current intensity (which he called "electromagnetic force" at that time) can be used as a basic quantity in the circuit. Further experiments led to the law named after him. Later, he dealt with his experimental work mathematically and theoretically, and wrote a book "galvani Circuit-Mathematical Research" (published in 1827).

When Ohm's Law was first published, it was not taken seriously by German academic circles, but was criticized and attacked by various kinds. Ohm presented a book of his works to the then Prussian Minister of Education Sulz, requesting to arrange a job in the university. But the minister was not interested in science and only put him in a military school. At this time, a physicist with a considerable position in the German physics field, G.E.Pohl, first wrote an article attacking Ohm's book "galvani Circuit-Mathematical Research", saying that this book is "incredible deception" and "its only purpose is to read the dignity of nature". Under strong pressure, Ohm hoped that the king would come forward to solve the problem. He wrote a letter to King Ludwig I, and therefore set up a special committee of the Bavarian Academy of Sciences for deliberation. The result ended because of disagreement. In his letter to a friend, he revealed the painful feelings of this period: "The birth of galvani Circuit brought me great pain. I really complained that it was born at an untimely time, because people living in the imperial court lacked knowledge and they could not understand the true feelings of its mother." Ohm's work gained great reputation abroad, and only then did it get attention in the domestic scientific community. Through the efforts of ellman (P.Hermann, 1764 ~ 185 1), Dover (H.W.Dove, 1803 ~ 1879) and Hailmann, Ohm achieved his goal. To commemorate his contribution to circuit theory, the unit of resistance was named ohm.

His research work also includes acoustics and optics.