30. Induction and Inductance

A conducting rod of length $l$ moves with constant velocity $v$ perpendicular to a uniform magnetic field of magnitude $B$. What is the magnitude $e$ of the motional emf induced in the rod?

A thin rod moves in a perpendicular, unknown magnetic field. If the length of the rod is 10 cm and the induced EMF is 1 V when it moves at 5 m/s, what is the magnitude of the magnetic field?