A copper disc of radius 0.1 m is rotated about its centre with 10 revolutions per second in a uniform magnetic field of 0.1 Tesla with its plane perpendicular to the field. The e.m.f. induced across the radius of disc is [MH CET (Med) 2001]

• A.            \[\frac{\pi }{10}\ V\]         
• B.            \[\frac{2\pi }{10}\ V\]
• C.            \[\pi \times {{10}^{-2}}V\]     
• D.            \[2\pi \times {{10}^{-2}}V\]