15), potential on the dipole axis (q = 0, p ) is given by
2
0
1
4
p
V
εr
= ±
π
(2 16)
(Positive sign for q = 0, negative sign for q = p ) The potential in the
equatorial plane (q = p/2) is zero The important contrasting features of electric potential of a dipole
from that due to a single charge are clear from Eqs