2. Let's return to the charged ring from Homework 2:
a
dl
P
Recall that this ring had a charge density of \(\lambda\) C/m, radius a, and a total charge Q.
(a) Determine the electric potential V at point P. (Hint: Use a similar approach as to
when we found the electric field of this ring!)
(b) Using your answer from part (a), determine V at the origin. How is this different
from the magnitude of the electric field at the origin? (You may use the expression
for E from Homework 2, and need not re-derive it.)
