A rod of length $60 \mathrm{~cm} rotates with a uniform angular velocity 20 \mathrm{~rad} \mathrm{s}^{-1} about its perpendicular bisector, in a uniform magnetic filed 0.5 T$. The direction of magnetic field is parallel to the axis of rotation. The potential difference between the two ends of the rod is _________ V.
Choose the correct answer: