Aconducting spherical shell of radius a is divided imto four equal sectors (n dhe aimuthal abyo tually pelpendi- cubir planes whose common sime f mese ctim is the z axis.(see the fiqure). these. sectois are nsulated from each othe y small gaps and ave altenately at the potentials +o ood -vo. find the 4v% pontidistribrtion in the region outside the sphere