Question:

An electric dipole coincides on the z-axis and its centre coincides with the origin of the cartesian coordinate system. The electric field at an axial point at a distance z from the origin is Eᶻ and the electric field at an equatorial point at a distance y from the origin is Eʸ. Given that y=z))a, the value of | Eᶻ/Eʸ | is