PHYS1230 Name: Date Practice 17: Gauss's Law 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 -30. a. What is the electric field in the region a b? e. Determine the magnitude and direction of the electric field in the region r > b. f. Find the induced surface charge density on the inner and outer cavity walls of the conductor. N