Two equal and opposite charges q with a separation 2a form an electric dipole of dipole moment p (= 2qa). The line joining the midpoint of dipole to a point R at a distance r from it makes an angle θ with the dipole axis. The electric potential at R (when r >> 2a) will be -
1
\(V = \dfrac{p \cos \theta}{4n E_0 r^2}\)
2
\(V = \dfrac{p \cos \theta}{4n E_0 r}\)
3
\(V = \dfrac{p \sin \theta}{4 n E_0 r}\)
4
\(V = \dfrac{p \cos \theta}{2n E_0 r^2}\)