Question
A point charge q is placed off centre at point c inside a thick spherical shelll of inner radius a and outer radius b. Shell is neutral and conducting. OA =ra , OB = rb & OC = rc. Then the potential at centre of shell will be ( also show the distribution of charges )
Joshi sir comment
Distribution: at C q, at inner surface -q, at outer surface +q
so potential at centre = kq/rc -kq/a + kq/b