A straight conductor of length ?l moves with an acceleration ?=0.1a=0.1 ms-2 at the right angle to the magnetic field of uniform strength ?=B=11.1 T. Calculate ?l, considering that the e.m.f., ?=???ϵ=Blv, between the ends of the conductor increased from 0 to 5 V during the first 20 s after the beginning of motion.

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