My textbook says:
- Inside a conductor, electric field is zero.
- The interior of a conductor can have no excess charge in static situation.
- Electric field just outside a charged conductor is perpendicular to the surface at every point.
I know that these laws are meant for solid conductors or in other words conducting materials alone. But if we had a hollow spherical conducting sphere maybe with air (or any insulator) as the medium inside the sphere, how would these laws be affected if a positive charge ( or any charge for that matter) is placed inside the sphere in air (static condition).