A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field B. The work done to rotate the loop by 30o about an axis perpendicular to its plane is
A. MB
B. √3 MB/2
C. MB/2
D. zero
Answer:D
A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field B. The work done to rotate the loop by 30o about an axis perpendicular to its plane is
A. MB B. √3 MB/2 C. MB/2 D. zero