A hollow sherical conducting shell is suspended in air by an insulated string. The total charge on the conductor is -6 microCoulombs. If an additional point charge of +2 microCoulombs is placed in the hollow region inside the shell what is the total charge induced on the inside surface of the shell.
The Attempt at a Solution
I know already that a charge will be induce on the inside surface as a closed, hollow conductor shields its interior from fields due to charges outside, but does not shield
its exterior from fields due to charges placed inside it. However is the answetr simply that -2 microCoulombs will be induced on the inside of the sphere? Or will I have to account for the charge on the outside also interacting with the charge induced on the inside surface?
Many thanks in advance!