question_answer

A copper rod of Length I rotates about its end with angular velocity \[\omega \] in a uniform magnetic field B. The emf developed between the ends of the rod if the field is normal to the plane of rotation is:

A) \[B\omega {{l}^{2}}\]

B) \[\frac{1}{2}B\omega {{l}^{2}}\]

C) \[2\,B\omega {{l}^{2}}\]                      

D) \[\frac{1}{4}\,B\omega {{l}^{2}}\]