Charge in a spherical conducting shell

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Homework Help Overview

The problem involves a conducting spherical shell with a specified charge and potential, where the goal is to determine the charge based on given radii and potential values.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to calculate the electric field using Gauss's law and integrates it to find the potential. They express uncertainty about their calculated charge compared to an expected value.

Discussion Status

Participants are engaging in clarifying the problem and seeking to identify potential errors in the original poster's calculations. There is an invitation for the original poster to provide more details about their calculations.

Contextual Notes

The original poster mentions specific inner and outer radii, as well as a discrepancy between their calculated charge and the expected answer from their assignment.

Markv
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Homework Statement


There's a conducting spherical shell with Q = q2 and V =100v and outter radius R


Homework Equations


V=k*Q/R


The Attempt at a Solution



First I calculate the E field using Gauss law, and I get E=q2/4*Pi*E0*r

Integrating the E field to get the potential V y get:

V = q2/4*pi*E0*R = 100

And there I get the value of q2
 
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Sorry this is the first time I open a thread and I might haven't been too concise.

Im asked to find the charge in the sphere knowing the inner radius = 0.15m and the outter radius = 0.2

The result I get is 2.22 exp -9 when the correct answer according to my assignment should be 1.67 exp -9 so i don't know where the mistake is.
 
We can help you find your mistake if you can show us exactly what formula you used and what numbers you put in it.
 

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