lecture19

# lecture19 - Physics 2102 Physics 2102 Lecture 19 Lecture 19...

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Unformatted text preview: Physics 2102 Physics 2102 Lecture 19 Lecture 19 Ch 30: Ch 30: Inductors and RL Circuits Inductors and RL Circuits Physics 2102 Jonathan Dowling Nikolai Tesla What are we going to learn? What are we going to learn? A road map A road map Electric charge Electric force on other electric charges Electric field , and electric potential Moving electric charges : current Electronic circuit components: batteries, resistors, capacitors Electric currents Magnetic field Magnetic force on moving charges Time-varying magnetic field Electric Field More circuit components: inductors. Electromagnetic waves light waves Geometrical Optics (light rays). Physical optics (light waves) Inductors are with respect to the magnetic field what capacitors are with respect to the electric field. They pack a lot of field in a small region. Also, the higher the current, the higher the magnetic field they produce. Capacitance how much potential for a given charge: Q=CV Inductance how much magnetic flux for a given current: =L i (Henry) H Ampere m Tesla ] [ : Units 2 = Joseph Henry (1799-1878) Inductors: Solenoids Inductors: Solenoids dt di L EMF- = Using Faradays law: Self-Inductance of a solenoid Self-Inductance of a solenoid Solenoid of cross-sectional area A , length l , total number of turns N , turns per unit length n Field inside solenoid =...
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## This note was uploaded on 11/18/2011 for the course PHYSICS 2102 taught by Professor Dowling during the Fall '10 term at LSU.

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lecture19 - Physics 2102 Physics 2102 Lecture 19 Lecture 19...

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