Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center? (Use any variable or symbol stated above along with the following as necessary: ke.)
V = V2R - V0 =

Question

Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center? (Use any variable or symbol stated above along with the following as necessary: ke.)
V = V2R - V0 =

anonymous · Answer

you can see at this book: foundamentals of physics by Holliday, in chap electrical potential

anonymous · Answer

Wouldn't electric field at the center be zero?