A conducting rod $($length $($:$=80cm\}$ rotates at a constant angular rate of $15$ revolutions per second about a pivot at one end. A uniform field $)=(60mT$ is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?

$2\mathrm{.}7$ V

$2\mathrm{.}1$ V

$2\mathrm{.}4$ V

$1\mathrm{.}8$ V