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Electricity has been a subject of scientific interest since at least the early 17th century. William Gilbert was a prominent early electrical scientist. ( "First" Electrician")
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The English physicist Stephen Gray discovered electrical conductivity in 1729.
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Benjamin Franklin proposes the notion of positive and negative charge
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First electric battery by Alessandro Vlota.
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In 1827, using equipment of his own creation, Georg Simon Ohm determined that the current that flows through a wire is proportional to its cross-sectional area and inversely proportional to its length or Ohm's law.
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As electricity and electrical devices such as lighting systems became mainstream at the end of the 19th century, the demand for electricians to install, repair and maintain such devices and systems increased.
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specialization emerged at the end of the 19th century: industrial, commercial and domestic.
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On April 24, 1877 Charles F. Brush was issued U.S. Patent No. 189,997 for his arc lighting system
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Thomas Alva Edison invented the lightbulb. (Everywhere could be illuminated now)
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Heinrich Hertz discovers and measures the waves
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Nikola Tesla invents the first practicable AC motor and polyphase power transmission system
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Harvey Hubbell II patented the first detachable electric plug in the United States. (outlet)
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Edwin Howard Armstrong developed FM radio receiver
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First nuclear power plant in the US
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Electronic calculator