Question

A positively charged ball is placed inside an uncharged hollow conducting sphere, 

(a) Where is there an electric field and what kind of field is it? 

(b) Will the hollow sphere become charged? 

(c) Where will the electric field change if the ball is displaced inside the sphere and what is the nature of this change? 

(d) How will the field inside and outside the sphere change if a charged body is brought near the sphere?

Answer 1

(a) There is a field inside and outside the sphere.

(b) On the inner surface of the sphere there is a negative charge; on the outer surface, a positive charge.

(c) The electric field inside the sphere will change.

(d) Only the electric field outside the sphere will change.