openstax-text-for-physics-2b---marasco---chapter-6-23-1.2.pdf - 1 OpenSTAX Text for Physics 2B Marasco Chapter 6(23 Collection edited by David Marasco

Openstax-text-for-physics-2b---marasco---chapter-6-23-1.2.pdf

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OpenSTAX Text for Physics 2B - Marasco - Chapter 6 (23) Collection edited by: David Marasco Content authors: David Marasco and OpenStax Based on: OpenSTAX Text for Physics 2B - Marasco Fall 2016 < >. Online: < > This selection and arrangement of content as a collection is copyrighted by David Marasco. Creative Commons Attribution License 4.0 Collection structure revised: 2016/08/04 PDF Generated: 2017/07/27 23:45:57 For copyright and attribution information for the modules contained in this collection, see the " Attributions " section at the end of the collection. 1
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Table of Contents 1 Electromagnetic Induction, AC Circuits, and Electrical Technologies . . . . . . . . . . . . . . . . . . . . . . . . 5 Induced Emf and Magnetic Flux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Faraday’s Law of Induction: Lenz’s Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Motional Emf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Eddy Currents and Magnetic Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Electric Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Back Emf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Reactance, Inductive and Capacitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 RLC Series AC Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
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1 ELECTROMAGNETIC INDUCTION, AC CIRCUITS, AND ELECTRICAL TECHNOLOGIES Figure 1.1 These wind turbines in the Thames Estuary in the UK are an example of induction at work. Wind pushes the blades of the turbine, spinning a shaft attached to magnets. The magnets spin around a conductive coil, inducing an electric current in the coil, and eventually feeding the electrical grid. (credit: modification of work by Petr Kratochvil) Chapter Outline 1.1. Induced Emf and Magnetic Flux Calculate the flux of a uniform magnetic field through a loop of arbitrary orientation. Describe methods to produce an electromotive force (emf) with a magnetic field or magnet and a loop of wire. 1.2. Faraday’s Law of Induction: Lenz’s Law Calculate emf, current, and magnetic fields using Faraday’s Law. Explain the physical results of Lenz’s Law 1.3. Motional Emf Calculate emf, force, magnetic field, and work due to the motion of an object in a magnetic field. 1.4. Eddy Currents and Magnetic Damping Explain the magnitude and direction of an induced eddy current, and the effect this will have on the object it is induced in. Describe several applications of magnetic damping. 1.5. Electric Generators Calculate the emf induced in a generator. Calculate the peak emf which can be induced in a particular generator system. 1.6. Back Emf Explain what back emf is and how it is induced. 1.7. Transformers Explain how a transformer works. Calculate voltage, current, and/or number of turns given the other quantities. 1.8. Inductance Calculate the inductance of an inductor. Calculate the energy stored in an inductor. Calculate the emf generated in an inductor.
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