(March 16, 1789 – July 6, 1854)

Georg Simon Ohm was a mathematician who achieved fame through his intuitive experiments with acoustics and electricity. Prior to that, he studied the publications of Leonhard Euler, Sylvestre Lacroix and Pierre-Simon Laplace: before polishing the skills of a young Peter Dirichlet. His younger brother, Martin Ohm, was as well an accomplished mathematician, who in 1823 became the first to develop the complete Theory of the Exponential ab in instances where a and b are complex numbers. Georg Ohm was preoccupied by electric batteries which Alessandro Volta had invented when he (Ohm) was just 10 years old. He ran all sorts of experiments with them: modifying some apparatuses and developing new ones in order to quench his curiosities. At last he discovered that when electric current flows through a conductor, a relationship develops between that current, the voltage and the resistance of the material which constitute the conductor. Further experiments convinced him that the electric current passed through a conductor is directly proportional to the voltage across that conductor divided by the material’s electrical resistance. This became known as Ohm’s Law, and the S.I. unit of electrical resistance was designated as Ohm in his honor. He published this discovery in his 1827 treatise titled: The Galvanic Circuit Analyzed Mathematically. In addition to his other publications (which included a law of acoustics), Georg Simon Ohm was commended for: Contributions to Molecular Physics, and Elements of Analytic Geometry Concerning the Skew Coordinate System. He is the eponym of the 64-kilometer-wide Ohm lunar crater.

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  1. Dear Sir or Madam,

    We are a group of teachers writing and editing Physics coursebooks for highschool in Turkey.
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    We would like to use this image in one of our coursebooks if you give us permisson.

    Georg Simon OHM image. http://www.sapaviva.com/georg-simon-ohm/

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    Tahsin Demirciler
    Physics Teacher

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