Two hemispheres, and a shell inside dielectric material

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The discussion focuses on two physics problems involving spherical shells with varying charge densities. The first problem involves a spherical shell with hemispheres of different charge densities, where the user struggles with direct integration due to a lack of symmetry, despite successfully using separation of variables. The second problem concerns a spherical shell with a charge density of σcos(θ) placed in a dielectric material, where the user has solved for the potential but questions whether the potential inside the shell is constant. The user seeks clarification and assistance on these topics. Overall, the discussion highlights challenges in solving electrostatic potential problems in complex geometries.
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Hello,I am trying to solve two different questions, and I am having trouble finding the solution:

1- Spherical shell of radius R, have two hemispheres of different charge density. The northerns hemisphere is +σ and the southern hemisphere is -σ. Use direct integration to find V inside and outside the shell. (i.e V=k∫σ'/χ dr').

2- A spherical shell of radius a that have charge density of σcos(θ) is placed in a dielectric material that surround it and makes spherical shape around it with radius b. Find V in the whole space using separation of variables.[i.e shell of radius a attached from the inside to a dielectric material of radius a to b]For (1), I solved it using separation of variables, and it does give me a series. The problem with direct integration is that there is no symmetry in the space so I cannot solve the problem on specific axis! more than that, I have no idea how to solve the problem inside the sphere.

For (2), I did solve the question but I am wondering, is the potential inside the shell is constant or not?
 
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I tried to be as clear and simple as possible. If anyone can help and didn't get fully what I wrote or my post seems vague, please comment.
 
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