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Early Investigations of Electricity and Magnetism: A Historical Report

This AVI file presents a detailed historical overview of the early investigations into electricity and magnetism, dating back to 600 B.C. with the Greeks and their discovery of elektron (amber). The video covers key figures such as William Gilbert, Benjamin Franklin, and Michael Faraday, highlighting their contributions to understanding electromagnetism. The report delves into pivotal experiments and laws developed by scientists like Coulomb, Volta, Oersted, Ampere, and Ohm, which laid the foundation for modern electromagnetic theory. The presentation explores the interconnected nature of electricity and magnetism, culminating in Faraday's groundbreaking experiments that demonstrated the conversion between the two forces.

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Early Investigations of Electricity and Magnetism: A Historical Report

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Presentation Transcript

  1. 電磁學歷史的報告AVI檔 通訊一甲 B09622027 李忠憲

  2. 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.

  3. 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

  4. 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

  5. 1785 Charles Augustin de Coulomb (French) Measured electric and magnetic forces Coulomb’s Law

  6. 1800 Alessandro Volta (Italian) • Invented voltaic cell (Chemical Battery) Constant Current Zinc Copper

  7. 1819 Hans Christian Oersted (Danish) • Discovered Electricity can produce Magnetism • E & M are related

  8. 1820 Andre Marie Ampere (French) Motor equation

  9. Three-pole DC Motor

  10. 1826 Georg Simon Ohm (German) • Formulated Ohm’s law • 1839 Contributions were recognized • 1843 Verified by Wheatstone (Wheatstone bridge)

  11. 1831 Michael Faraday (English) • Demonstrated that magnetism could produce electricity • Faraday’s law • Faraday’s experiment

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