Chapter 22, Problem 33E

(a)

To determine

The sign and magnitude of the excess charge induced on the inner surface of the metal if any.

(b)

To determine

Whether there is any excess charge on the outside of the piece of metal.

(c)

To determine

Whether there is electric field inside the cavity.

(d)

To determine

Whether there is an electric field within the metal and outside the piece of metal.

(e)

To determine

Whether a person outside the solid can measure the electric field due to the charge $-Q$ and whether the concept of shielding could applied for gravity.