Question: i) Find the vector potential A (0, 0, z ) above a circular current loop of radius a in the x-y plane. ii) Obtain the

i) Find the vector potential A (0, 0, z ) above a circular current loop of radius a in the x-y plane.
ii) Obtain the magnetic field at an axial point due to a solenoid. Also, deduce the magnetic field at the center of the solenoid.

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