An electric charge 10-3 μC is placed at the origin (0, 0) of (x-y) co-ordinate system. Two points A and B are situated at (√2, √2) and (2,0) respectively. The potential difference between the points A and B will be
(a) 4.5 Volt
(b) 9 Volt
(c) Zero
(d) 2 Volt
