Lecture_17 - Chapter 19 Capacitors, Resistors and Batteries...

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Chapter 19 Capacitors, Resistors and Batteries
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Capacitor: Charging and Discharging Experiment 1 Experiment 2
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The capacitor in your set is similar to a large two-disk capacitor s D Capacitor: Construction and Symbols There is no connecting path through a capacitor
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Capacitor: Discharge
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Capacitor Discharge The fringe field of the capacitor plus the electric field of the charges on the surface of the wires drive current in a way to REDUCE the charge of the capacitor plates. Recall that we derived an expression for the fringe field by considering the superposition of two charged disks separated by a distance s. We ignored the small amount of charge on the exterior of the capacitor. See Lecture 8 Part 1 notes.
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Fringe field of a capacitor rises until E =0 in a wire – static equilibrium. Fringe field opposes the flow of current! Capacitor: Charging
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Ultimately, the fringe field of the capacitor and the field due to charges on the wire are such that E=0 inside the wire. At this point, i =0. Why does current ultimately stop flowing in the circuit?
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This note was uploaded on 04/02/2008 for the course PHYS 272 taught by Professor K during the Winter '07 term at Purdue University-West Lafayette.

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Lecture_17 - Chapter 19 Capacitors, Resistors and Batteries...

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