Question

four point charges +q, -q, +q and -q are placed at the vertices ABCD of a square of side r in cyclic order what is the electric potential at the center of the square ​

Answer 1

Answer:

hey mate!

V at center = 2. kq/r - 2. kq/r

i.e. potential due to two +q charge + potential due to two -q charge

therefore potential at center = 0 V

hope it helps..