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a point charge Q rests at the center of an uncharged thin spherical condcting shell. with is the the electric field E, as a function of r.....then it asks for r less than the inner radius of the shell... then it asks for inside the shell, and finally beyond the shell.

now how im invisioning the figure is almost like a washer, with a thickness, like the rings of saturn....

so for the first part i need to find E as a function of r....so i thinks to myself... E0 (constant) = 1/ (4(k)(pi)) and gauss's law states

flux = EA flux also = q/E0 so EA = q/ Eo after a little algebra

i get E= Qk/ R^2 using SA of a sphere for area...... ok so im pretty sure thats right for the first question....if not please tell me where i went wrong......next part asking for r less than inner radius of shell????

i have no idea what to put............one thing i do understand is that when there is a charge in a shell, the electric field continues as if there was no shell present, by this i mean if Q is positive , negative charges accumulate on inner shell circumference, and positive accumlate on SA of total spherical shell........... this is all kind of new to me, and i dont think i have a great grasp on all of this,,,,,,also a coule off topic questions....what is the diff,,,between q (test charge) and Q////// as always thanks a million for any help/ information.