Question
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