Final answer:
To calculate the electric potential at a point on the axis of the annulus, we can exploit the angular symmetry of the problem and use the formula for the potential due to a ring of charge.
Step-by-step explanation:
To calculate the electric potential at a point on the axis of the annulus, we can exploit the angular symmetry of the problem. Using the information provided in Example 7.14, we can determine the electric potential at a point on the axis passing through the center of the ring. By considering the uniform charge density of the ring and using the formula for the potential due to a ring of charge, we can calculate the electric potential at the desired point.