SMU PHYS 1308 - The Magnetic Field od Moving Charge

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The magnetic field of moving chargeProf. Stephen Sekula3/24/2011Supplementary Material for PHY1308 (General Physics – Electricity and Magnetism)Announcements●Homework 7:●Due Tuesday by 9:30am●Next week●I am traveling for LHC-related work●Mr. Ferrante will cover the lectures and administer the Thursday quiz●Extra office hours tomorrow, 10-noon (Hughes-Trigg)terrestrial magnetismRefrigerator magnets: ~100G (~0.01T)Rare earth magnets: ~0.5-1.0TSo, the scale of terrestrial magnetism is about 1T.Hans Christian Oersted1777-1851Danish physicist and chemist.Observed in 1819 that an electric current caused a compass needle to deflect. This observation caused quite a stir. Electricity and magnetism were related phenomena.Biot and SavartJean-Baptiste Biot1774-1862Felix Savart1791-1841Magnetic field from an infinite line of current.Bohr Model of the Atom(not to scale!)●Introduced in 1913.●Very successful at explaining atomic properties. ●Replaced by full quantum mechanical model in 1920s.~10-10 mTreat the atom like a “planetary system” - electrons in orbit around nucleus, maintained by electric


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SMU PHYS 1308 - The Magnetic Field od Moving Charge

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