1. The problem statement, all variables and given/known data If you have a conducting shell with charge Q surrounding a conducting sphere of charge negative - Q, what is the potential at the outside of the conducting shell? What about the inside? 2. Relevant equations V=(kQenclosed)/r 3. The attempt at a solution I don't know if the above equation holds true in this case. Are these assumptions correct: 1. On the outside of the conducting shell, potential is 0? 2. On the inside, the potential is kQ/R where R is the radius of the conducting shell?