Chapter 11: Problem 7
Verify that (11-35) can also be obtained by using (11-29) and (11-30).
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Chapter 11: Problem 7
Verify that (11-35) can also be obtained by using (11-29) and (11-30).
These are the key concepts you need to understand to accurately answer the question.
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Show that the solution of Laplace's equation can be written as a sum of terms each of the form \(X(x)+Y(y)+Z(z) .\) Be sure to show how these functions, or appropriate derivatives of them, are related, if in fact they are. Find the general form of \(X(x)\) and interpret the corresponding electric field.
Solve the two-dimensional form of Laplace's equation expressed in plane polar coordinates \((\rho, \varphi)\) by separation of variables. Thus, show that the general solution has the form
A circle of radius \(a\) lies in the \(x y\) plane with its center at the origin. The semicircular part of the boundary for \(x>0\) is kept at the constant potential \(\phi_{0} ;\) the other semicircle for \(x<0\) is kept at the constant potential \(-\phi_{0}\). Find \(\phi\) for all points within the circle. Find \(\mathbf{E}\) at the center of the circle.
Two infinite conducting planes are parallel to the \(x y\) plane. One of them is located at \(z=0\) and is kept at a constant potential \(\phi_{0}\). The other, at constant potential \(\phi_{d}\), has \(z=d .\) The region between them is filled with charge with volume density \(\rho=\rho_{0}(z / d)^{2}\). Solve Poisson's equation to find \(\phi\) for \(0 \leq z \leq d\). Find the surface charge density on each plate.
A spherical cavity of radius \(a\) is within a large grounded conductor. A charge \(q\) is placed within the cavity at a distance \(b\) from the center. Find \(\phi\) at all points within the cavity by using spherical coordinates with origin at the center and \(z\) axis passing though the location of \(q\). Find \(\mathbf{E}\) at all points within the cavity. Find \(\mathbf{E}\) at the center of the cavity. Find the surface charge density induced on the wall of the cavity. What is the total induced charge on the wall?
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