A coil of N turns and radius R carries a current I It is unwound and rewound to make - Physics - Moving Charges And Magnetism

Question

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

Himanshu · Accepted Answer

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.