Consider the following two situations. A thin nonconducting…

 Consider the following two situations. A thin nonconducting ring of radius R is cut into two pieces, one making an arc of 90°, the other 270°. Now, equal positive charges +Q are put (uniformly) on each of them. Which of the following statements is true about the electric potential and the magnitude of the electric field (E) at the centers of the two arcs? (The two arcs are very far apart).