The conducting rod ab shown in the figure makes frictionless contact with metal

Question

The conducting rod ab shown in the figure makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.600 T, perpendicular to the plane of the figure. Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed 8.80 m/s. In what direction does the current flow in the rod? The current in the rod is from a to b. The current in the rod is from ft to a The current in the rod is zero. If the resistance of the circuit abed is a constant 3.50 ohm, find the direction of the force required to keep the rod moving to the right with a constant speed of 8.80 m/s. Find the magnitude of the force mentioned in part (C).

Explanation / Answer

part A: = Bvl = .6*8.8*.5 = 2.64 V

part B :   b to a

part C: Force directed towards right

part D ; F = BIl = 0.23 N

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