Question

A very thin hollow conducting sphere has a radius of R=0.12 m. The center of the sphere is at S. A charge of q=7×10−6 C is present at point P which is located d=0.09 m from S. Assume that this charge stays at this position (thus it cannot move). We draw a line from S to P and extend it beyond the radius of the sphere.
What is the Electric field strength (V/m) at point D which is located on the line from SP at a distance of ℓ=0.38 m from S (thus 0.29 m from P)? Note that the graph is not drawn to scale