QUESTION If the charge at the center of the sphere is made positive, how is the charge on the inner surface of the sphere affected? (Select all that apply.)

The charge on the inner surface would be positive.
The absolute value of the charge on the inner surface would remain the same.
The absolute value of the charge on the inner surface would increase.
There would be no net charge on the inner surface.
The absolute value of the charge on the inner surface would decrease.
The charge on the inner surface would be negative.

Suppose the charge at the center is now increased to +5Q, while the charge at the surface of the conductor is changed to +2Q. (Use the following as necessary: ε0, Π, Q and r.)

(a) Find the electric field exterior to the sphere, for r > b.

(b) What's the electric field inside the conductor, for a < r < b.

(c) Find the charge distribution on the conductor.