KCET2019PhysicsMagnetic Effects of Current
A circular current loop of magnetic moment ( M ) is in an arbitrary orientation in an external uniform magnetic field ( B ). The work done to rotate the loop by ( 30^ ) about an axis perpendicular to its plane is
Options
- A( M B 2 )
- BMB
- CZero
- D( 3 M B 2 )
Correct answer
C. Zero
Step-by-step solution
(C) Even though the coil is rotated, about an axis perpendicular to its plane, the potential energy does not change. Hence, work done is zero.