The electric field at a distance of 0.143m from the surface of a solid insulating sphere with radius 0.381m is 1630N/C .
a) Assuming the sphere's charge is uniformly distributed, what is the charge density inside it?
b) Calculate the electric field inside the sphere at a distance of 0.237m from the center.
E1/E2 = r1/r2
E = Cr
The Attempt at a Solution
a) I know that the electric field for part a can be found by using the formula E=Cr, so I can get C = 4278.22 N/(C*m). I know that the charge density is a factor of C, but I do not know the actual formula for it.
b) This should be able to be solved with the ratio E1/E2 = r1/r2, and when I solve for E2 I get a result of 737.2 N/C. This result is not correct, but I am not sure if the problem is in my ratio.