In the figure below, a solid sphere, of radius a = 1.50 cm is concentric with a spherical conducting shell of inner radius b = 2.00a and outer radius c = 2.40a. The sphere has a net charge q1 = +3.00 fC which is distributed uniformly through the sphere; the shell has a net charge of q2 = −q1. (d) What is the magnitude of the electric field at radial distance r = 1.60a?  N/C(e) What is the magnitude of the electric field at radial distance r = 2.10a?  N/C(f) What is the magnitude of the electric field at radial distance r = 3.30a?  N/C   (I assumed that you solved these like the previous 3 but i guess there's an extra step)

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter25: Gauss’s Law
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Problem 43PQ: The nonuniform charge density of a solid insulating sphere of radius R is given by = cr2 (r R),...
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In the figure below, a solid sphere, of radius a = 1.50 cm is concentric with a spherical conducting shell of inner radius b = 2.00a and outer radius c = 2.40a. The sphere has a net charge q1 = +3.00 fC which is distributed uniformly through the sphere; the shell has a net charge of q2 = −q1.

(d) What is the magnitude of the electric field at radial distance r = 1.60a?
  N/C

(e) What is the magnitude of the electric field at radial distance r = 2.10a?
  N/C

(f) What is the magnitude of the electric field at radial distance r = 3.30a?
  N/C

 

(I assumed that you solved these like the previous 3 but i guess there's an extra step) 

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