(a) A small current loop moves with constant velocity v₀ as viewed in the laboratory frame. Find the vector potential A(r) and the scalar potential ϕ(r) in the lab frame. It may be convenient to introduce the vector R = r − v₀t.
(b) Take the limit ν₀ << c in your formulae and deduce that the moving loop possesses both a magnetic dipole moment and an electric dipole moment.