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## Homework Statement

What is the potential at the center of the sphere relative to infinity? The sphere is dielectric with uniform - charge on the surface of the sphere.

## Homework Equations

##k=\frac {1}{4\pi\epsilon_0}##

##V=\frac {KQ}{r}##

## The Attempt at a Solution

If the distance r=0 it would be wrong to have that in the denominator, so I put it as ##V=\lim_{r \rightarrow 0} \frac {-KQ}{r}=-\infty## It makes sense that your potential would be infinitely small since you are approaching the negative source charge at the center of the sphere