Ohm And Ohm 's Law Essay

2277 Words Nov 26th, 2014 10 Pages
Introduction to unit “Ohm”
Ohm is the derived SI unit of electrical resistance, symbolised as (Ω omega) and named after famous physicist and mathematician Georg Simon Ohm and who is best known for the formulation of ohm’s law, which defines a relationship between electrical resistances, electric current and potential difference across the circuit. Ohm’s law states that the current flow through the conductor between two points is directly proportional to the potential difference across the two points. Mathematical expression of ohm’s law is: where I is current through the conductor in units of Ampere, V is potential difference across two points in the units volt, R is the resistance of the conductor and measured in the units of ohm. R is constant and independent of current in relation to ohm’s law. One ohm is defined as transmitting a current of one Ampere when subjected to a potential difference of one volt. 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.
This discovery of electrical unit “ohm” in the field of science was considered as a key to unlock the hurdles of electrical circuit analysis. There were many scientists who tried to develop this relationship but Georg was the only one who proved his hypothesis. Initially his idea of “ohm laws “ was rejected but Georg’s strong determination…

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