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Solution - For a Point on the Axis of the Quadrupole, Obtain the Dependence of Potential On R For R/A >> 1 - Potential Energy in an External Field - Potential Energy of a Dipole in an External Field

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Figure 2.34 shows a charge array known as an electric quadrupole. For a point on the axis of the quadrupole, obtain the dependence of potential on for r/>> 1, and contrast your results with that due to an electric dipole, and an electric monopole (i.e., a single charge).

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