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A conducting rod of mass 50 gm and lengt...

A conducting rod of mass `50 gm` and length `10 cm` can slide without friction on two long, horizontal rails. A uniform magnetic field of magnitude `5 mT` exists in the region as shown. A source `S` is used to maintain a constant current `2 A` through the rod. If motion of the rod starts from the rest, its speed after `10 s` from the start of the motion will be

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