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for E(X,r) = 0 for r_1 < R, E inside the sphere is 0.

If r_2 > R then E ≠ 0 ; but let's say E(X,r_2) := w

If you put all the charge of the sphere into X then, it would still be E(X,r_2) = w

Why is that so? I could imagine that, if you had r_1 << R, but I found it first without the special case that R a lot larger than r_1

Where can I get information about that?

Case 2. Now the charge is no longer equally distributed over the sphere. Then E(X,r_1) is no longer 0. But what happens with E(X, r_2) ?

My guess is, that E = w, because in case 1 it didn't matter, if you viewed the sphere as a sphere or as a point. However I can't say for sure.

Can someone plz help me?