AP EAMCET2016PhysicsMagnetic Effects of Current
A charge q is spread uniformly over an isolated ring of radius R . The ring is rotated about its natural axis with an angular velocity . Magnetic dipole moment of the ring is
Options
- Aq R^2 2
- Bq R 2
- Cq R^2
- Dq 2R
Correct answer
A. q R^2 2
Step-by-step solution
Magnetic dipole moment M =n i ~A , n=1, M = iA The current in the ring, i=q / t=q f Where, f= frequency of charge aligned & i =q 2 ( =2 f f= 2 ) & M =q 2 R ^2= 1 2 q R^2 aligned