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Q.21 A rectangular loop of resistance R, and sides I and x, is pulled out ofa uniform magnetic field B with asteady velocity v. The necessary force F required for maintaining uniform velocity of withdrawal is-B2122(C) RBl2B212v(B) B 1 V(D) 0 |
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Answer» emf = BLv and i = BLv/R also, F = BLi = B²L²v/R Note : you can also, do this question by checking the dimension of the options.. and matching it with dimension of F |
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