Final answer:
The potential at a point at infinity is zero.
Step-by-step explanation:
To find the potential at a point at infinity, we can use the formula for the potential due to a uniformly charged sphere:
V = k * (Q/r)
Where V is the potential, k is the electrostatic constant, Q is the total charge, and r is the distance from the center of the sphere to the point.
Since the point is at infinity, the distance r becomes infinite. As a result, the potential V will approach zero at infinity. Therefore, the potential at a point at infinity is zero.