Problem: Two charged concentric spheres have radii of 7.50 cm and 13.00 cm. The charge on the inner sphere is 33.00 nC and the charge on the outer sphere is 31.50 nC. Find the electric field at 9.97 cm.
Part A: Find the electric field at 19.00 cm.
I'm looking for a brief but thorough explanation, and an example.