Question

A small conducting spherical shell with inner radius a and outerradius b is concentric with a larger conducting spherical shellwith inner radius c and outer radius d (see the Figure ). The innershell has total charge +2q, and the outer shell has charge+4q.


A.) Calculate the magnitude of the electric field in terms of q andthe distance r from the common center of the two shells for r<a.And find the direction of the electric field for r<a
B.) Calculate the magnitude of the electric field for a<r<b.And find the direction of the electric field for a<r<b.
C.) Calculate the magnitude of the electric field for b<r<c.And find the direction of the electric field for b<r<c.