1. The problem statement, all variables and given/known data Calculate the capacitance of a spherical capacitor of inner radius A and outer radius B which is filled with a di-electric varying as e=c+dcos^2θ . c and d are constants and θ is the angle made with the z axis.(also known as the polar angle) 2. Relevant equations $C=εA/d$ 3. The attempt at a solution At first,i thought maybe i should take the potential by keeping θ constant,and then taking the average of the potential to get avg V and then find the potential.Again,I realized that we could also consider the spheres to be thin parallel plates.But,both the process give different answer.Is either of them right?and if one is,can someone explain the process.