Student Education Repository (மாணவர்கள் கல்விக் களஞ்சியம்): Today (July 6, 1854) is the Memorial Day of the German physicist Georg Simon Ohm, who discovered the relationship between voltage and current.

Tuesday, July 6, 2021

Today (July 6, 1854) is the Memorial Day of the German physicist Georg Simon Ohm, who discovered the relationship between voltage and current.

Today (July 6, 1854) is the Memorial Day of the German physicist Georg Simon Ohm, who discovered the relationship between voltage and current.

George Simon Ohm was born on March 16, 1789 in Erlangen, Brandenburg-Berit Germany. Educated at the University of Erlangen. While working as a school teacher, Ohm began his research with the electrochemical cell discovered by the Italian physicist Volta. He found that there was a direct correlation between the difference between the two terminals of a conductor (voltage) and the resulting current with his own tools. Describing this relationship is known as Ohm's law. The unit of resistance in international units is given its name as ohm (code).

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When a voltage is applied to a conductor, current flows through it. The magnitude of that current depends on the magnitude of the voltage applied to it. For example, if V is the amount of voltage flowing between the two terminals of an electric conductor (e.g. metals, ducts) with a resistance of R, then the magnitude of that current can be calculated as follows: V = IR. This idea was put forward in 1827 by the German scholar Georg Ohm. This Ohmment he made was later given as Ohmin's rule. In short, Ohm's law states that the current I flowing in a conductor I has a direct proportional dependence on the voltage V given between its two terminals.

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In other words, the ratio between voltage and current is constant. That is, this constant number R is called the electrical resistance. By Ohming current with current, one can understand Ohm's law. If the water pressure is voltage, the current is current, and a current barrier is a resistance, then the higher the water pressure, the higher the current.

Before them, in 1781, Henry Cavendish filled salt water in glass tubes of different sizes and injected electricity into them. Accordingly, he found that the magnitude of the current also changes if the magnitude of the voltage changes. But their discovery went unnoticed by other researchers. The discovery was later made in 1879 by the scientist James Clerk Maxwell. George Ohm was awarded the Copley Medal in 1841. The German physicist George Simon Ohm, who discovered the connection between voltage and current, passed away on July 6, 1854, at the age of 65 in Munich, Bavaria.

Source By: Wikipedia

Information: Ramesh, Assistant Professor of Physics, Nehru Memorial College, Puthanampatti, Trichy.