A coil of N turns and radius R carries a current I. It is unwound and rewound to make another
coil of radius R/2, current remaining the same. Calculate the ratio of the magnetic moment of the
new coil and original coil.
A coil of N turns and radius R carries a current I. It is unwound and rewound to make another
coil of radius R/2, current remaining the same. Calculate the ratio of the magnetic moment of the
new coil and original coil.