a What is the electric monopole moment of this distribution

a What is the electric monopole moment of this distribution of charge?

b What is the electric dipole moment of this distribution of charge?

c. what is the electric potential at a distance r from the origin for this distribution where r> a, accurate to order 1/(r^2)?

Note theta\' = theta prime im just using \' as notation in this cas

Solution

electric monopole

A single electric point charge, such as an electron or positron, in which all the electric field lines point inward for a net negative electric charge or away for a net positive electric charge.

electric dipole

An electric dipole is a separation of positive and negative charges. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some (usually small) distance.