The discoveries of humanity – Electricity

The discoveries of humanity – Electricity



People live differently now more than 100 years before being discovered electricity. First they talked about electricity in history were the Greeks 2000 years ago. They noted that friction causes the amber fur attraction between the two.

In 1600, English physicist William Gilbert (May 24, 1544 – November 30, 1603) coined the term “electric”, derived from the Greek “elektron” to identify emerging force between two objects rub against each other. Gilbert used items were amber and a magnet, thus registering for the first time the word “electric” in a report about the theory of magnetism.

It is said that in 1752, Benjamin Franklin (January 17, 1706 – 17th of April 1790 the US) did a famous experiment at flying a kite tempest with silk top which sank a key iron. The experiment proved Franklin’s theory later but was very dangerous, he can be killed by lightning. This breakthrough has induced the idea that light and electricity are closely connected, later leading to the invention of the lightning rod. Benjamin Franklin’s face is placed prominently on US 100 dollar banknote.

In 1786, Luigi Galvani, an Italian professor of medicine noted that a frog leg kicking violent death when touched by a metal knife. He thought that the frog muscles are carriers of electricity.

In 1792, another scientist Alessandro Volta Italian contradicted him on Galvani’s discovery saying that the main factor is achieving the two metals: knife, metal tray that was lying frog. Volta showed that when we talk about humidity between two different metals, electricity is created. This phenomenon led him to the discovery of the first batteries, voltaic cell made of thin sheets of cupule and zinc, separated by a wet cardboard (hence the name of the unit of measure, Volt).

A great contribution to the theory of electricity had it but the Englishman Michael Faraday (Newington, September 22, 1791 – London, August 25 1867). He found that when you put a magnet in a coil of copper wire, a tiny electric current flowing through wires. It is the first method of generating electricity through movement in a magnetic field.

Sir Joseph Swan (October 31, 1828, Pallion, UK – May 27, 1924) invented the filament lamp incandescent (light) although many books and I give the inventor the popular Thomas Alva Edison (February 11, 1847 – October 18, 1931) American citizen and businessman. Edison invention registered in the US Patent Office (the only authority recognized American invention) based on a design of Swan made ten years earlier. When he learned, Swan sued him and won Edison. US Patent Office invalidated the patent to him Edison and forced him to take on Swan partner in his company. Together they managed to develop an electric lighting system that contained all the necessary elements to practical use, safe and economically incandescent light. Swan and Edison managed together to illuminate for the first time in history an electric street lamps or bulbs. It happened in September 1882 in New York.

Nikola Tesla (July 10, 1856, Smiljan Lika, Croatia – January 7, 1943, New York) is considered the “father” of today’s wireless devices. Tesla has patented engine generating AC and it seems that he sold his invention to George Westinghouse (which has and employee). At 30 he emigrated to America and was employed at the company’s Thomas Edison. There was an agreement with Edison revolt against the way in which the latter leading scientific research, has resigned and has decided to work for himself. In 1891, after the success of its system based on alternating current, Tesla transformer realized that bears his name today. This allows to obtain voltage transformer with values of up to several million volts.

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