|Feb7-11, 09:14 PM||#1|
Consider two metal spheres of radii...
1. The problem statement, all variables and given/known data
Consider two metal spheres of radii r1 = R and r2 = 2R, both charged to the same potential V0.
a) What is the ratio n1/n2 of their surface charge densities?
2. Relevant equations
n(eta) = charge/area
Er = -dV/dr
3. The attempt at a solution
a) n1/n2 = Q/(4*pi*R2) / Q/(16*pi*R2) = 4
The answer is supposed to be 2, and I don't know what I'm doing wrong.
|Feb7-11, 09:59 PM||#2|
The spheres are charged to the same potential (volts), not the same charge (Coulombs).
|charge density, electric field, metal, potential, sphere|
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