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In a magnetic field as shown, in Fig. tw...

In a magnetic field as shown, in Fig. two horizontal wires of same mass and length `l_(1) and l_(2)` are free to slide on different vertical rails with velocities `v_(1) and v_(2)` respectively. If the resistance of two circuits are same and `a_(1) and a_(2)` are acceleration of two horizontal wires respectively, the condition for `a_(1)gta_(2)` is

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