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Two wires of the same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Two wires of the same length are shaped into a square of side 'a' and a circle with radius 'r'. If they carry same current, the ratio of their magnetic moment is

Two copper wires A and B of the same length and samw diameter are shpaed into a square and a circle respectively. If the wires in these forms carry the same current, then the ratio of the magnetic moment of A to that of -B is

A wire of length l is bent in the form of a square and carries a current I. What is the value of its magnetic moment?