Question: (a) Show by direct calculation that the Coulomb gauge condition A = 0 applies to (b) Find the choice of gauge where a

(a) Show by direct calculation that the Coulomb gauge condition ∇ · A = 0 applies to

A(r): Ho 4 dr' j(r) |rr|

(b) Find the choice of gauge where a valid representation of the vector potential is

A(r): Ho 4 dr' j(r) |rr|

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