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Electric potential

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1. Homework Statement
A charge q sits in a spherical hollow inside a spherical conductor.

q is located at r=0
Hollow from r = 0 to r =a
from r=a to r=b a conductor
r=b to r = infinity free space

Find the potential everywhere
2. The attempt at a solution
I calculated these
[tex] E = \frac{1}{4 \pi \epsilon_{0}} \frac{q}{r^2} \hat{r} [/tex]
for r<a and r> b

E= 0 for a<r<b


To find the potential from 0 to r=a is what concerns me... We end up having hte potential blow up in at the origin.

it is late and im not thinking striaght but i cant see a way out ....

please help!
 

Answers and Replies

Your answer is correnct.... Good job....

We end up having hte potential blow up in at the origin.
That is absolutely normal for a point charge, That is the reason why we have to
DEFINE V = 0 at r = infinity instead of r = 0
 

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