Introduction to Electrodynamics · Problem 3.31

Potentials — David J. Griffiths

Physics · multipole-expansion

Problem

For the dipole in Ex. 3.10, expand 1/r±1/\mathscr{r}_\pm to order (d/r)3(d/r)^3, and use this to determine the quadrupole and octopole terms in the potential.

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