A metallic rod PQ of length I is rotated with an angularvelocity w about an axis passing through its

A metallic rod PQ of length I is rotated with an angularvelocity w about an axis passing through its

A metallic rod PQ of length I is rotated with an angular velocity w about an axis passing through its mid-point (O) and perpendicular to the plane of the paper, in uniform magnetic field B, as shown in the figure. What is the potential difference developed between the two ends of the rod, P and Q?