- #1

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- Homework Statement:
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- Relevant Equations:
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I am rather confused how to answer this (Please focus on "find the potential at the center"):

I thought that would be a good idea try to answer this with the Poisson equation.

$$\nabla \phi = - \frac{\rho}{\epsilon}$$

So that, since the eletric field inside a hollow spherical shell is zero, the potential at the center is just equal to the potential at R1.

I found this solution

$$\phi = \sum K_{i}(\frac{\rho(R_{2}^2-R^2)}{6 \epsilon} + C(\frac{1}{R_{2}}-\frac{1}{R}))$$

But i have no idea how to go on