A 1.0 m long metallic rod is rotated with an angular frequency of $500\, rad\, s^{-1}$ with one end hinged at the center and the other end at the circumference of a circular metallic ring of radius 1 m about an axis passing through the center and perpendicular to the plane of the ring. A constant and uniform magnetic field of 0.6 T parallel to the axis exists everywhere. The emf developed between the center and the ring is

150 V

The correct answer is Option (4) → 150 V