- #1
hitemup
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Homework Statement
A flat ring (inner radius R_0, outer radius 4R_0) is uniformly charged. In terms of the total charge Q, determine the electric field on the axis at points
a) 0.25R_0
b) 75R_0
from the center of the ring. [Hint: The ring can be replaced with two oppositely charged superposed disks.]
Homework Equations
Gauss's Law
Coulomb's Law
The Attempt at a Solution
I'm okay with part b. The ring will be like a point charge, so using Coulomb's law would lead to the correct result.
But I'm not even sure what I'm supposed to imagine for part a. I guessed that it would be zero eventually because there cannot be electrical field inside a conductor, but didn't do anything like hint says I should.