UPSEE 2017 Solved Paper

The magnitude of electric dipole moment is p.
At a point distance I from point A. In this situation, the dipole moment tries to rotate the dipole as given in the above figure.
So, considering the position of P, the resultant potential at A is
VA=

kp‌cos‌π

r2

=−

kp

r2

‌‌‌‌[∵cos‌π=−1]