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The History of Electromagnetics By: Brent Bouws Engr 302 5/7/01 Professor Ribeiro

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Overview n Early Electromagnetics n Charles Coulomb n André-Marie Ampère n Allesandro Volta n Michael Faraday n James Clerk Maxwell n Conclusion

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Early Electromagnetics n Amber - The ancient greeks realized that it attracked chaff and feather particles. n Loadstone - Chinese used it properities to invent the compass.

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Charles Coulomb n He was a civil engineer in the French army, but had to quit due to illness. n He discovered that electric forces obey the same inverse square law Newton discovered.

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Alessandro Volta n Learned that body tissue could conduct electricity from his friend Galvini. n Discovered that all metals could conduct electricity. n Created the voltaic pile as the first continuous electric power source.

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André-Marie Ampère n Early in life his father was beheaded during the French Revolution. n After Orsted discovered in 1820 that electricity induced magnetism he wrote a mathematical paper to describe the behavior in one week.

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Michael Faraday, early life n Grew up in a poor family in England. n He received very little formal education. n Read many books as an apprentice bookbinder and did experiments in the shop. n Aftering attending a lecture by Humphrey Davy he was hired as a lab assistant.

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Michael Faraday, later life n While Faraday made discoveries Davy became jealous and tried to take credit. n Knew that electricity could produce magnetism, but could magnetism produce Electricity?

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James Clerk Maxwell (Dafty) n Born into a wealthy family in Edinburgh. n Was well educated and inquisitive. n Went to Cambridge college, but moved to Trinity for competitive reasons.

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James Clerk Maxwell n Was a professor at Trinity, Aberdeen, and London. n Put Faraday’s Law in mathematical form. n Discovered the famous 4 equations that govern electromagnetics. n Devout Christian.

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Conclusion The history of electromagnetics shows that it is a series of discoveries of many people instead of by just one person.

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Test over Magnetism- Friday. Agenda for the day Lecture- Magnetic Induction Finish Lab from yesterday… Making an electromagnet…turn in Finish coloring.

Test over Magnetism- Friday. Agenda for the day Lecture- Magnetic Induction Finish Lab from yesterday… Making an electromagnet…turn in Finish coloring.

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