Obtain an expression for the magnetic vector potential, due to a circular current loop of radius a carrying steady current I, at a point on its axis at distance x from the centre. Discuss the limiting case for
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Consider a circular loop of radius (a) lying in the (xy)-plane and carrying a steady current (I). The magnetic vector potential at a field point (\vec r) is defined by [ \vec A(\vec r)=\frac{\mu_0}{4\pi}\oint \frac{I, d\vec l'}{|\vec r-\vec r'|}, ] where (d\vec l') is the line element along the current loop _______ ___ ________ _____ __________.
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