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Shows a wire of length l which can slide...

Shows a wire of length l which can slide on a U- shaped rail of negligible resistance. The resistance of the wire is R. The wire is pulled ot the right with a constant speed v. Draw an equivalent circuit diagram representing the induced emf by a battery. Find the current in the wire usingj this diagram.
(##HCV_VOL2_C38_S01_019_Q01##)
(##HCV_VOL2_C38_S01_019_Q02##)

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Strategy : Motional emf in the wire equals Bvl. Force `qvecvxxvecB` experienced by electrons is in upward direction. Terminal P of wire is thus negative Equivalent circuit is thus as shown in the diagram here.
Solution : Current in the circuit from Ohm's law is `i=(Bvl)/(R)`
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