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## Homework Statement

Consider a solid conducting sphere with an

inner radius R1 surrounded by a concentric

thick conducting spherical shell which has an

inner radius R2 and outer radius R3. There is

a charge Q on the sphere and no net charge

on the shell.

For all parts of this problem, we adopt

the standard convention of setting the electric

potential at infinity to zero.

Find the potential at Point A.

Find the Potential at Point O.

I have posted the problem and the choices. it is questions 10 and 11.

## Homework Equations

V= kQ/r

## The Attempt at a Solution

I think that the potential at point A is: 3. Va= KQ/a

For Point O: either 0 or infinity

Can somebody please tell me if I am correct. Thanks in advance.