A copper rod of length `2m` is rotated with a speed of `10 rps`, in a uniform magnetic field of `1` tesla about a pivot at one end. The magnetic field is perpendicular to the plane of rotation. Find the emf induced across its ends

Explanation

`e = (1)/(2)B omega l^(2) = (1)/(2)B(2 pi n)l^(2) = pi B n l^(2)`
`e = 3.14 xx 1 xx 10 xx 2 xx 2 = 125.6 "volt"`