Electric flux trough an infinite plane 2

AI Thread Summary
An electric charge Q is located at the origin, and the discussion revolves around finding the electric flux through an infinite plane at a distance z from the z-axis. A participant expresses difficulty in obtaining the correct answer and requests feedback on their solution attempts. Another contributor suggests using Gauss's law to simplify the problem, emphasizing that integration may not be necessary. They also point out an error in the participant's calculations regarding the differential area element, dS. The conversation highlights the importance of clarity in mathematical presentation and encourages a conceptual approach to the problem.
julius71989
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Sorry, what I posted earlier was wrong.. here is the question:

an charge Q is at the origin. Find the electric flux an infinite plane at z distance from z axis.

Please check my attempts to the solution. Please check what's wrong in it because until now I am not getting the correct answer.. thanks a lot. click the link below:

figure: http://pic40.picturetrail.com/VOL359/11337670/20318718/330158477.jpg
solution: http://pic40.picturetrail.com/VOL359/11337670/20318718/330158480.jpg
 
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Man! That is REALLY hard to read. I usually don't pester people about using TeX, but that's pretty bad. The sheer font wackiness is awful. I think you are forgetting that dS=2*pi*r*dr. Note the r. I'd be more sure, but I can't look at that jpg again. It hurts my eyes. :)
 
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You don't have to integrate it to find the flux. Think in terms of Gauss law and electric field lines and you can avoid all the maths.
 
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