Question 2: Vector potential A for a square current loop+ A square loop of side length 2Z lies in the x-y plane, with its centre at the origin, with a current I circulating around the loop. a) Calculate the vector potential A at a general point (x,Q) in the x-z plane due to the current flow in the loop. b) Determine for large distance r = √√x² + z² how the vector potential varies with r and with the angle O that ŕ makes with respect to the z-axis. c) Compare the r and 0 dependence of A at larger with the expression for A associated with a circular loop of radius a. +