The induced emf:

$\overline{){\mathbf{\epsilon}}{\mathbf{=}}{\mathbf{B}}{\mathbf{l}}{\mathbf{v}}}$, where B is the magnetic field, l is the length of the rod, and v is the velocity of the rod.

Consider a conducting rod of length 28 cm moving along a pair of rails, and a magnetic field pointing perpendicular to the plane of the rails.

At what speed (in m/s) must the sliding rod move to produce an emf of 0.75 V in a 1.75 T field?

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