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A capacitor is a device that stores electric energy Lecture 10

A capacitor is a device that stores electric energy

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Lecture 10. A capacitor is a device that stores electric energy. Point Charge Q, E-lines, E-flux, Gauss Law. Simple Example of Gauss Law:. Porcupine-Needle Analogy. Gauss Law:. Electric flux through surface. Charge enclosed by surface. - PowerPoint PPT Presentation

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Page 1: A capacitor is a device that stores electric energy

A capacitor is a device that stores electric energyLecture 10

Page 2: A capacitor is a device that stores electric energy

Point Charge Q, E-lines, E-flux, Gauss Law

Simple Example of Gauss Law:

Electric flux through surface

Charge enclosed by surface

Gauss Law:

Porcupine-Needle Analogy

Page 3: A capacitor is a device that stores electric energy

Given: A Sphere conductivity shell with Q on the surface

Spherical Cavity: Ein = 0,

Page 4: A capacitor is a device that stores electric energy

Gauss Law: Long Rod

(agrees with near field expression)

Page 5: A capacitor is a device that stores electric energy

Infinite SheetGiven:

Find: near the surface

(cylindrical Gaussian surface)

Charge Enclosed by Gaussian Surface:

Page 6: A capacitor is a device that stores electric energy

Clicker Question: Clicker 10.1

Page 7: A capacitor is a device that stores electric energy

Recap:

Gauss Law:

Porcupine-Needle Analogy

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