The general form of Gauss's law describes how a charge cre- ates an electric field in a material, as well as in vacuum: Tin E · dA = where e = Ke, is the permittivity of the material. (a) A sheet with charge Q uniformly distributed over its area A is sur- rounded by a dielectric. Show that the sheet creates a uni- form electric field at nearby points with magnitude E = Q/2 Ae. (b) Two large sheets of area A, carrying opposite charges of equal magnitude Q, are a small distance d apart. Show that they create uniform electric field in the space between them with magnitude E = Q/Ae. (c) Assume the negative plate is at zero potential. Show that the positive plate is at potential Qd/Ae. (d) Show that the capacitance of the pair of plates is given by C = Ae/d = KA€,/d.
The general form of Gauss's law describes how a charge cre- ates an electric field in a material, as well as in vacuum: Tin E · dA = where e = Ke, is the permittivity of the material. (a) A sheet with charge Q uniformly distributed over its area A is sur- rounded by a dielectric. Show that the sheet creates a uni- form electric field at nearby points with magnitude E = Q/2 Ae. (b) Two large sheets of area A, carrying opposite charges of equal magnitude Q, are a small distance d apart. Show that they create uniform electric field in the space between them with magnitude E = Q/Ae. (c) Assume the negative plate is at zero potential. Show that the positive plate is at potential Qd/Ae. (d) Show that the capacitance of the pair of plates is given by C = Ae/d = KA€,/d.
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter19: Electric Forces And Electric Fields
Section: Chapter Questions
Problem 18P
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