Question

A solid conducting sphere of radius r1 is surrounded

Answer 1

✔A solid conducting sphere with radius R carries a positive total charge Q . Thesphere is surrounded by an insulating shell with inner radius R and outer radius 2R . ... (c) As a general rule, the electric field is discontinuous only at locations where there is a thin sheet of charge.

Answer 2

Explanation:

A solid conducting sphere of radius R is surrounded by a concentric metallic shell of inner radius 2R and outer radius 3R. The shell is earthed. The inner sphere is connected to a switch S by a thin conducting wire through a small hole in the shell.