Q. 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
Answer: (iii) π : 4
Q. 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
Answer: (iii) π : 4