Gauss's Law - Charged Sphere Electric Field

Describe the significance of the Gaussian surface in the context of electric fields.

What is Gauss's law and how is it applied to derive the electric field of a charged sphere?

Explain how the electric field outside a uniformly charged sphere behaves compared to a point charge.

What happens to the electric field inside a conductor and an insulator?

How does the electric field depend on the radius and charge distribution inside an insulator?