Ametallic sphere of radius 2 cm is positively charged with 5 μc of charge, which spreads on the surface of the sphere uniformly. the metallic sphere stands on an insulated stand and is surrounded by a larger metallic spherical shell, of inner radius 5 cm and outer radius 6 cm. now, a negative charge of 5 μc is placed on the spherical shell, which spreads out uniformly on the inner surface of the shell. answer below questions. let v ( r → [infinity] ) = 0 .