Question
Question: A metallic rod of 1 m length is rotated with a frequency of 50 revolution per second, with one end h...
A metallic rod of 1 m length is rotated with a frequency of 50 revolution per second, 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. A constant uniform magnetic field of 1 T parallel to the axis is present everywhere. The emf between the centre and the metallic ring is
A
157 V
B
117 V
C
127 V
D
137 V
Answer
157 V