Consider the Point Source and Guard Ring configuration as shown in quadrant B of Fig. 1. If you apply 28V to the guard ring and 0V to the central point on the conductive paper
(a) Where is the electric potential most positive?
(b) Where is the electric potential most negative?
(c) What is the electric potential outside the guard ring? Does it vary?
![2062_conduct.png](https://secure.tutorsglobe.com/CMSImages/2062_conduct.png)