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lect13_handout - Physics 202 Lecture 13 Todays Topics...

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1 Physics 202, Lecture 13 Today’s Topics Sources of the Magnetic Field (Ch 30) Overview of Sources for Electric and Magnetic Fields Magnetic Field Generated By Current The Biot-Savart Law Gauss’s Law In Magnetism Gauss s Law In Magnetism The Ampere’s Law Magnetic field around straight current. Preview: Ch 30.1-3 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 Thursday Sources for the magnetic field: Electric current (Biot-Savart Law/Ampere’s Law) Æ today Change of E field (Ampere-Maxwell Law) Æ today Î All these features are summarized in Maxwell Equations. Demo: Oersted’s Effect Another Right Hand Rule Quick Quiz: Magnetic Field And Current Which figure represents