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Sunshine748

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## Homework Statement

Consider two metal spheres of radii r

_{1}= R and r

_{2}= 2R, both charged to the same potential V

_{0}.

a) What is the ratio n

_{1}/n

_{2}of their surface charge densities?

## Homework Equations

n(eta) = charge/area

E

_{r}= -dV/dr

## The Attempt at a Solution

a) n

_{1}/n

_{2}= Q/(4*pi*R

^{2}) / Q/(16*pi*R

^{2}) = 4

The answer is supposed to be 2, and I don't know what I'm doing wrong.

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