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Ohm's law has been observed on a wide range of length scales. In the early 20th century, it was thought that Ohm's law would fail at the atomic scale, but experiments have not borne out this expectation. As of 2012, researchers have demonstrated that Ohm's law works for silicon wires as small as four atoms wide and one atom high. [17]
Georg Simon Ohm (/ oʊ m /; [1] German: [ˈɡeːɔʁk ˈʔoːm]; [2] [3] 16 March 1789 – 6 July 1854) was a German physicist and mathematician.As a school teacher, Ohm began his research with the new electrochemical cell, invented by Italian scientist Alessandro Volta.
As another writer has said, with the coming of Jenkin's and Maxwell's books all impediments in the way of electrical students were removed, "the full meaning of Ohm's law becomes clear; electromotive force, difference of potential, resistance, current, capacity, lines of force, magnetization and chemical affinity were measurable, and could be ...
The law was proposed by physicist Georg Ohm in 1843. [3] Hermann von Helmholtz elaborated the law into what is often today known as Ohm's acoustic law, by adding that the quality of a tone depends solely on the number and relative strength of its partial simple tones, and not on their relative phases.
Ohm's law is a basic law of circuit theory, stating that the current passing through a resistance is directly proportional to the potential difference across it. The resistance of most materials is relatively constant over a range of temperatures and currents; materials under these conditions are known as 'ohmic'.
1826 – Georg Simon Ohm states his Ohm's law of electrical resistance in the journals of Schweigger and Poggendorff, and also published in his landmark pamphlet Die galvanische Kette mathematisch bearbeitet in 1827. The unit ohm (Ω) of electrical resistance has been named in his honor. [18]
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Ohm's law: Electronics: Georg Ohm: Osipkov–Merritt model: Astrophysics: Leonid Osipkov, David Merritt: Ostwald dilution law: Physical chemistry: Wilhelm Ostwald: Paley–Wiener theorem: Mathematics: Raymond Paley and Norbert Wiener: Pareto distribution Pareto efficiency Pareto index Pareto principle: Economics: Vilfredo Pareto: Pascal's law ...