電磁學歷史的報告AVI檔通訊一甲 B09622027 李忠憲.

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Presentation transcript:

電磁學歷史的報告AVI檔通訊一甲 B09622027 李忠憲

Early Investigations of Electricity and Magnetism B.C. 600 Thelas (Greek) Math. Astr. & Phil. Amber = elektron (Greek) Electricity, electron, electronic Loadstone, found in Magnesia => Magnet, Magnetism Fluff Amber Silk L. S. L. S.

A. D. 1600 William Gilbert (English) Systematic experiments of electrostatic effects Recognized that the earth is a huge magnet Principles of compass S N Earth

1752 Benjamin Franklin (American) Established conservation of charge Positive (glass) and Negative (hard rubber) charges were named. Kite experiment Suggested the use of lightning rods to protect buildings

1785 Charles Augustin de Coulomb (French) Measured electric and magnetic forces Coulomb’s Law

1800 Alessandro Volta (Italian) Invented voltaic cell (Chemical Battery) Constant Current Zinc Copper

1819 Hans Christian Oersted (Danish) Discovered Electricity can produce Magnetism E & M are related

1820 Andre Marie Ampere (French) Motor equation

Three-pole DC Motor

1826 Georg Simon Ohm (German) Formulated Ohm’s law 1839 Contributions were recognized 1843 Verified by Wheatstone (Wheatstone bridge)

1831 Michael Faraday (English) Demonstrated that magnetism could produce electricity Faraday’s law Faraday’s experiment