A hollow conducting sphere of radius R carries a negative charge -q.?

Question

Write expressions for the electric field E inside (rR) the sphere. Also indicate the direction of the field.

What would a graph of the field strength as a function of r look like?

Answer 1

The charge resides evenly on the sphere.

For anywhere inside, r
For r>R, the E field is as if the charge is at the center of the sphere. Spherical symmetry applies so the E field is radial in direction pointing inward.

Answer 2

how is the charge q/8?