Derive the expression for the electric field magnitude in terms of the distance r from the center for the region r b. Express your answer in terms of some or all of the variables Q, a, b, and appropriate constants. A conducting spherical shell with inner radius a and outer radius b has a positive point charge Q located at its center. The total charge on the shell is 3Q, and it is insulated from its surroundings (gure 1). Muest Answer Figure 1of1 Part E Complete previous part(s) v PartF What is the surface charge density on the inner surface of the conducting shell? Express your answer in terms of some or all of the variables Q, a, b, and appropriate constants. .AZCbrtC)? A conducting spherical shell with inner radius a and outer radius b has a positive point charge Q located at its a,- = center. The total charge on the shell is 3Q, and it is Muest Answer insulated from its surroundings (gure 1). Figure 1 of1 v Part G What is the surface charge density on the outer surface of the conducting shell? Express your answer in terms of some or all of the variables Q, a, b, and appropriate constants. 00: Muest