Question: Electric quadrupole Figure shows an electric quadrupole. It consists of two dipoles with dipole moments that are equal in magnitude but opposite in direction. Show

Electric quadrupole Figure shows an electric quadrupole. It consists of two dipoles with dipole moments that are equal in magnitude but opposite in direction. Show that the value of E on the axis of the quadrupole for a point P a distance z from its center (assume z >> d) is given by E = 3Q/4??₀z⁴ in which Q (= 2qd²) is known as the quadrupole moment of the charge distribution.

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