• Kelly Sassin and Sarah Conner are working on the following problem:
• There is a solid, insulating sphere (R =3 m) with a total charge of -20 C and with uniform charge density. What is the electric field strength and the electric potential at (a) the surface (b) the center (c) a distance 2 m from the center (d) a distance 4 m from the center (e) graph the potential field as a function of r (f) What (if anything) would change if the sphere (with the same radius and charge) was a conducting and not dielectric?
• Sarah Conner thinks that nothing will since the radius and charge are the same. Kelly Sassin thinks it will change because of the difference of material. List which of the previous answers would change (if any) and their new values. 
•