Write the charge density of the system of the delta functions in 3 dimensions. Find the monopole, dipole and quadrup the multipole expansion of D(r) around

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Four charges are given on the xy-plane as shown on Figure.
i)
Write the charge density of the system in terms
of the delta functions in 3 dimensions.
ii)
Find the monopole, dipole and quadrupole in
the multipole expansion of (r) aroundr= 0.
a
a
Transcribed Image Text:Four charges are given on the xy-plane as shown on Figure. i) Write the charge density of the system in terms of the delta functions in 3 dimensions. ii) Find the monopole, dipole and quadrupole in the multipole expansion of (r) aroundr= 0. a a
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