A one metre long metallic rod is rotated with an angular frequency of 400 radian/s about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant uniform magnetic field of0.5 tesla parallel to the axis exists everywhere. The emf developed between the centre and the ring is(2) 100 V(4) 1000 V(1) 200 V(3) 50 V

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A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s⁻¹about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic field of 0.5 T parallel to the axis exists everywhere. Calculate the emf developed between the centre and the ring.

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