A brass rod of length 3.0 m fixed
at one end is rotating with angular velocity
200 rad `s^(-1)` about the fixed end in a uniform magnetic field of intensity 0-5 T. Find the induced emf between the centre and far end of the rod.

Explanation

Length of the rod =3.0 m
Angular velocity = `omega= 200 " rad" s^(-1)`
B = 0.5 T
Induced emf = e = ?
`e=(1)/(2)B omega I^(2)`
`e=(1)/(2)xx 0.5 xx 200 xx (3)^(2)`
e= 450 volt