A uniform magnetic field of 0.4 T act perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform

A uniform magnetic field of 0.4 T acts perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform angular velocity of 10  rad s–1 about an axis through its centre and perpendicular to the disc. What is the protential difference developed between the axis of the disc and the rim ? ( = 3.14)

 (1) 0.0628 V

 (2) 0.5024 V

 (3) 0.2512 V

 (4) 0.1256 V  

                                                                                                 (JEE-2025)