For you to know it is the separation of the point charges constituting the n^th linear multipolar distribution on a multipolar moment of order n as its shown in this picture. And it is generalization for the COMMON dipole moment equation P=Qr. But sure you can start your research by looking for...
Hello to everyone. The question or debate here is how you obtain the commonly known equation of dipole electric moment:
from the electrostatic potential equation for a multipole of order n:
I understand it is related with Dirac delta functions but a step by step solution might be helpful.Thank...