Physics Question from JEE Main 2025 · 28 January, Shift 2

A uniform magnetic field of $0.4 \, \text{T}$ acts perpendicular to a circular copper disc $20 \, \text{cm}$ in radius. The disc is having a uniform angular velocity of $10\pi \, \text{rad/s}$ about an axis through its center and perpendicular to the disc. What is the potential difference developed between the axis of the disc and the rim? ($\pi = 3.14$)