Zero. Dipoles do not have an electric field as it is cancelled out by the dipole it's self. However, the general rule for the propagation of an electric field is the inverse square law.
k is simply a constant of the value 9.9 x[tex]10^{9} N.m^{2} / C^{2}[/tex]
[tex]E = {k .Q}/d^2[/tex]
