Gauss's law, cylinder of length L

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Homework Help Overview

The discussion revolves around applying Gauss's law to determine the charge of a cylinder of length L. The original poster presents a formula related to electric flux and seeks clarification on the charge associated with the cylinder.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants question the clarity of the problem statement, specifically regarding the definitions of variables such as r, R, Φ, and Φ₀. There is also a discussion about whether the cylinder is hollow and how to approach the calculation of charge.

Discussion Status

Some participants have provided feedback on the need for clearer problem statements and assumptions. The original poster has attempted to derive an expression for charge but is seeking further guidance on how to calculate it. Multiple interpretations of the problem are being explored.

Contextual Notes

There are indications of missing information regarding the nature of the cylinder and the variables involved. The original poster references a test context, suggesting constraints on the problem setup.

lidl
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http://img404.imageshack.us/img404/4148/gauss3j.png (infinitly long)

[itex]\Phi=\Phi_{0}(1-{r \over R}) {C \over m^2}[/itex]

What's the charge of the cylinder of length L?

Again, almost everything was wrong...
 
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anyone? :(
 
Here's link to my paper: http://img202.imageshack.us/img202/5889/physics.jpg
 
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You need to be much clearer in the problem statement and your work.

Is the cylinder hollow? What do r, R, [tex]\Phi[/tex], and [tex]\Phi_0[/tex] represent?

Also, it's probably OK to write notes in your homework like "the electric field points radially outward so the flux through the top and bottom of the gaussian cylinder is zero" rather than relying on vague drawings
 
This is from the test, as you can see, and everything I knew was written down...
 
please delete this post
 
ok, now I got the following:

Q=integral of /rho(1-r/R) times rdr d/phi dl

Which is the answer for the question of what's the charge of the cylinder L.

How to calculate it?
 

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