A Series of N Uncharged Concentric Spherical Conducting Shells Surround $\infty$

A series of n uncharged concentric spherical conducting shells surround a small central charge q.The potential at a point outside the nth shell,at distance r from the center,and relative to V = 0 at $\infty$ ,is

A) $- \frac { n k _ { e } q } { r }$ .
B) $- \frac { ( \ln n ) k _ { e } q } { r }$ .
C) $+ \frac { k _ { e } q } { r }$ .
D) $+ \frac { ( \ln n ) k _ { e } q } { r }$ .
E) $+ \frac { n k _ { e } q } { r }$ .

Correct Answer:

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