(a) Show that the charge density of a point quadrupole is (r) = Q ij i...
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(a) Show that the charge density of a point quadrupole is ρ(r) = Qij ∇i ∇j δ(r − r0).
(b) Show that the force on a point quadrupole in a field E(r) is Qij ∂i∂jE(r0).
(c) Show that the torque on a point quadrupole in a field E(r) is N = 2(Q · ∇) × E + r × F where (Q · ∇)iQij ∇j.
(d) Show that the potential energy of a point quadrupole in a field E(r) is VE = −Qij ∂iEj (r0).
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a This is a quadrupole potential so r is correct as stated ...View the full answer
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