Physics question help?

[snke_eyes]

Need some help on this question. My first year electronics engineering technology.
CH. Electronic Potential and Electric Energy

In what region of space is the potential due to a uniformly charged sphere the same as that of a point charge? In what region does it differ from that of a point charge?

Thank you for your help.

[Kurdt]

any region outside the sphere it is the same as a point charge so maybe you can guess the other.