question_answer

A circular metal plate of radius R is rotating with a uniform   angular velocity \[\omega \]with its plane perpendicular to a uniform magnetic field B. Then the emf developed between the centre and the rim of the plate is [UPSEAT 2004]

A)            \[\pi \omega B{{R}^{2}}\]      

B)            \[\omega B{{R}^{2}}\]  

C)            \[\pi \omega B{{R}^{2}}/2\]  

D)            \[\omega B{{R}^{2}}/2\]