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What speed to produce a current?

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A metal rod is sliding to the right on two metal rails separated by a distance L = 0.25 m. The rails and the rod have zero resistance, but the rails are connected by a 12.6  resistor, and the entire system is in a uniform magnetic field of magnitude 0.93 T. What is the speed at which the metal rod must be moved in order to produce a current of 0.291 A in the resistor?

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