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# HW4 - ECE 134 Introductory Field Theory Fall 2010 Reading...

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ECE 134 Introductory Field Theory Fall 2010 Page 1 of 2 Reading Assignment: Cheng: Chapter 5, plus my notes on Conduction, Metals, and Joule Heating (web site) Cartoon Guide: Chapters 15-16 Homework #4 Due: Monday 25 October 2010 1) Consider the electrostatic problem with a hollow conducting tube at ground potential, and a solid conducting strip centered within the tube. This is similar to a coaxial line but with a rectangular cross section. In this problem assume , : a. Using a numerical PDE solver such as FlexPDE, solve for the potential everywhere inside the structure for the specific boundary conditions shown. Hint: it is possible to solve this problem by defining two separate “REGIONS”, but it is best to just define one region corresponding to the outer conducting boundary, and then define a second constant-voltage boundary inside this region for the inner conductor. You’re on the right track if Flex shows a computational mesh like the one at right, which indicates that it isn’t

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