A metallic rod of 1 m length is rotated with a frequency of 50 `rev//s`, with on 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 at to the plane of the ring. A constant uniform magnetic field of 1 T parallel to the axis is persent eveywhere. what is the e.m.f. between the centre and the metallic ring?

Explanation

To solve this problem, we need to determine the electromotive force (e.m.f.) generated in a metallic rod that is rotating in a magnetic field. The given parameters are:

- Length of the rod (L) = 1 m
- Frequency of rotation (f) = 50 revolutions per second (rev/s)
- Magnetic field strength (B) = 1 T (Tesla)
- The rod is rotating about an axis perpendicular to the plane of the circular ring.

### Step-by-Step Solution:
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