Magnetic InductionProf. Stephen Sekula4/7/2010Supplementary Material for PHY1308 (General Physics – Electricity and Magnetism)Announcements●Homework 9:●Due Tuesday by 9:30am●Exam 3●Next Thursday, in class●Review session (Q&A), Wednesday from 6-7pm in FS158Video still of recent hull breach in Southwest Airlines jet fuselagehttp://phet.colorado.edu/en/simulation/faraday1820Michael Faraday1792-1867Joseph Henry1797-1878Both of them discovered that a changing magnetic flux induces an electric current in a conductor.1870r0.5 T (time = 1.0s)r0.6 T (time = 2.0s)r0.7 T (time = 3.0s)r0.8 T (time = 4.0s)SNWhat If...Push the bar magnetSNNSViolates conservation of energy, since the bar magnet continues to accelerate without work being done.NSRealityPush the bar magnetEnergy is conserved – mechanical work transformed into current in wire, which resists bar magnet and heats the
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