lect15_handout - 1 Physics 202 Lecture 15 Today’s Topics...

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Unformatted text preview: 1 Physics 202, Lecture 15 Today’s Topics ¡ Faraday’s Law (Ch 31) ¡ Review Emf ¡ Change of Magnetic Flux and Emf ( ε ) ¡ Lenz’s Law and its applications ¡ Lenz s Law and its applications ¡ Formulation of Faraday’s Law ¡ Expected Preview: Ch 31.1-3 Sources of E and B Fields: An overview ¢ Sources for the electric field: £ Electric charges (Coulomb's Law, static) Æ subjects of past several weeks £ Change of B field (Faraday's Law, varying in time) Æ Today ¢ Sources for the magnetic field: £ Electric current (Biot-Savart Law/Ampere’s Law, static) Æ Last week £ Change of E field (Ampere-Maxwell Law, varying) Æ Ch 34 Î All these features are summarized in Maxwell’s Equations. Æ Ch 34 Review: Electromotive Force (emf, ε ) ¢ Electromotive “force”, emf, is a measure of the voltage that can be provided by a source. £ emf is not a force, it has a unit of volts £ sources of emf: • chemical process (battery) change of magnetic flux • change of magnetic flux...
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lect15_handout - 1 Physics 202 Lecture 15 Today’s Topics...

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