Question

A uniform conducting sphere having charge q is placed

Answer 1

Answer:

write the full question.

Answer 2

Here induction will take place as it is a conducting sphere. Here be it sphere or spherical shell, induction that will happen will be same for both as no charge can reside inside the body of a conductor, hence sphere will behave just as a spherical shell.

Now as there is no net charge on sphere initially and as we know induction never produces any extra charge and just redistributes charge, hence finally as well there will be no net charge on sphere. So what actually will happen is that some negative charge, say -Q, (bound charge as it is bound to that +q charge) will be developed on the sphere (not in the bulk, but just at the surface) at the end near the +q charge, and equal and opposite amount of charge (ie, +Q) will be developed at other surfaces of the sphere. And all this induction will happen in such a way that the net electric field (due to +q, +Q, -Q charges) at all points inside the body of conducting sphere will be zero.

Here note that -Q is the bound charge and +Q is the free charge (just some extra info!!).