Question

For the configuration from Ch. 24 pr 51, suppose a= 5 cm, b= 20 cm, and c= 25 cm. Suppose the electric field at a point 10 cm from the center is measured to be 3.6 x 10^3 N/C radially inward and the electric field at a point 50cm from the center is of magnitude 200 N/C and points radially outward. From this information, find a) the charge on the insulating sphere, b) the net charge on the hollow conducting sphere, c) the charge on the inner surface of the hollow conducting sphere and d) the charge on the outer surface of the hollow conducting sphere.