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Unformatted text preview: 1 March 7, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 1 Physics 132 Introductory Physics: Electricity and Magnetism Winter Quarter 2008 Lecture 26 March 7, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 2 Electromagnetism and Maxwells Equations Closed Surfaces Closed Loops E d A = Q enc Gauss Law B d A = No magnetic monopoles E d s = d B dt Faradays Law of Induction B d s = I enc + d E dt Amperes Law (w/ Maxwell Term) The four basic equations that govern electric and magnetic fields. Gauss Law: Electric charges create electric fields. Amperes Law: Moving electric charges (currents) create magnetic fields. Faradays Law: Changing magnetic fields create electric fields. Maxwells Term: Changing electric fields create magnetic fields. 2 March 7, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 3 Coil 1 Transformers & Mutual Inductance R Coil 2 i B Time-dependent current in Coil 1 creates...
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- Winter '08