Q. and are two points on the axis and the perpendicular bisector respectively of an electric dipole. and are far away from the dipole and at equal distances from it. The potentials at and are and respectively. Then,

 1861  204 Electrostatic Potential and Capacitance Report Error

Solution:

The potential at and are and respectively.
If and are two points on the axis and the perpendicular bisector respectively of an electric dipole
then
because, for the perpendicularity will be