Question

Example 6.6 A metallic rod of 1 m length is rotated with a frequency
of 50 rev/s, with one end hinged at the centre and the other end at the
circumference of a circular metallic ring of radius 1 m, about an axis
passing through the centre and perpendicular to the plane of the ring
(Fig. 6.11). A constant and uniform magnetic field of 1 T parallel to the
axis is present everywhere. What is the emf between the centre and
the metallic ring?​

Answer 1

single force act on the opposite side of the direction it is published and gravitational force acting on the book by the towards the centre