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.