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
(i) 2 : π
(ii) π : 2
(iii) π : 4
(iv) 4 : π
(ii) π : 2
(iii) π : 4
(iv) 4 : π
(iv) 4 : π
Explanation:
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 4 : π .
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