Lecture 10 feb5 PREVIEW - Lecture 10 Current and Resistance...

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Unformatted text preview: Lecture 10 Current and Resistance Exam scores on SAMS Exam solution Tuesday pm on ctools/resources Discussion instructors have scantrons Course grading scale As 83.0% 100% Bs 70.0% - 83.0% Cs 55.0% - 70.0% Ds 40.0% - 55.0% Mr. Watsoncome hereI want to see you What are these 2 items and how are they related? S. Morse in 1844 Al Bell in 1876 A little history early 1800scrude telegraphs 1837first commercial telegraph for railroad use 1844Samuel Morse public demo of telegraph 1866---Trans-atlantic telegraph cable 1876---Alexander G. Bells new telephone 1879---Thomas Edison caps 50 years of light bulb research 1882Edisons first electric power generating plant 1880sIndustry embraces electric lighting and motors 1889-92Edison-General Electric becomes G.E. 1899Trans-atlantic wireless signal Electric Current, I I = dQ/dt in Coulombs/s = Ampere (A) (direction convention is that of + charge flow) The actual flow direction of particles may be...
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This note was uploaded on 04/04/2008 for the course PHYSICS 240 taught by Professor Davewinn during the Spring '08 term at University of Michigan.

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Lecture 10 feb5 PREVIEW - Lecture 10 Current and Resistance...

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