Consider a long cylindrical dielectric shell of inner cross-sectional

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Homework Help Overview

The discussion revolves around a long cylindrical dielectric shell characterized by an inner radius \(a\), an outer radius \(b\), and a constant volume charge density denoted as \(\rho_0\). The problem involves determining the electric potential at any point inside the shell, given that the potentials of the inner and outer surfaces are held at 0 and \(V\), respectively.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the applicability of Poisson's equation versus Laplace's equation, with some suggesting that Laplace's equation should be used inside the shell due to the zero charge density in that region. There are questions about the number of equations needed to solve the problem and the correct interpretation of the charge density.

Discussion Status

The conversation is ongoing, with participants exploring different interpretations of the problem. Some have provided guidance on the use of Laplace's equation and separation of variables, while others are questioning the necessity of solving both equations. There is no explicit consensus on the approach to take.

Contextual Notes

Participants note the potential confusion regarding the charge density and its implications for the equations to be used. There is also mention of boundary conditions that must be satisfied in the solution process.

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Homework Statement


consider a long cylindrical dielectric shell of inner cross-sectional radius a , outer radius b, and constant volume charge density raw zero . THe potenials of the ineer and outer surfaces of the cylindrical shell are held at potentials 0 and V respectively as shown in the adjacent figure.
Solve the appropriate boundary value problem and use the given boundary conditions to find the electric potential at any point inside the shell

Homework Equations





The Attempt at a Solution


i used poissons equation between a and b is that true or should i also do laplaces equation inside a please reply??
 
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Poisson's equation is the right tool for there's a non-zero charge density. Laplace's equation assumes there's no charge
 


i know my friends in the exam solved two equations laplace and poisson i don't know my , but i did only one and got two constants , who do you think is right?? i know that inside the shell is between a and b only right??
 


Wait, it says that the charge density is zero inside the shell, so you should use laplace. Do separation of variables, obtain your bessel functions etc., and solve for the boundary values.

If it really is poisson you'll have to mess with finding the Green's function that satisfies the potential.
 


Mindscrape said:
Wait, it says that the charge density is zero inside the shell, so you should use laplace. Do separation of variables, obtain your bessel functions etc., and solve for the boundary values.

If it really is poisson you'll have to mess with finding the Green's function that satisfies the potential.

i meant raw zero is its name with charge density constant called raw zero, so how many equations am i solving one or two
ps: i couldn't find its symbol my friend mindscrape so i am very sorry
 

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