A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
A) −3q.
B) −(ln 3)q.
C) +q.
D) +(ln 3)q.
E) +3q.

Question

Quizplus · Accepted Answer

The charge on each shell of a conductor is distributed uniformly on the outer surface. Since the shells are uncharged, the net charge on the entire system must be q (the charge on the central charge q). Therefore, the charge on the outer surface of the third shell must be +q, in order to have a net charge of q for the entire system.

A Series of 3 Uncharged Concentric Shells Surround a Small