Question

What is the electric field on the surface of a thin conducting spherical shell containing uniform charge Q?

Answer 1

The field is

            E  =  1 / (4 pi ε₀)    Q / R²        directed radially outward from
                                                            the center of the shell.

R is the radius of the spherical shell.

Notice that the field is exactly the same as the field due to a point-charge
with magnitude 'Q' that's located at the center of the sphere.