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 π 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 ? (π = 3.14)
1
0.0628 V
2
0.5024 V
3
0.2512 V
4
0.1256 V