A coil of 'N' turns and radius 'R' caries a current 'I'. It is unwound and rewound to make a square coil of side 'a' having same number of turns (N). Kepping the current 'I' same, find the ratio of the magnetic moments of the square coil and the circular coil.
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A coil of N turns and radius R carries a current I. It is unwound and rewound to make a square coil of side ‘a’ having same number of turns (N), keeping the current ‘I’same. Find the ratio of magnetic moments of the square coil and circular coil.
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