One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped v, then the emf induced in the circuit in terms of B, l and v, where I is the width of each tube, will be

Question

Infinity Learn · Accepted Answer

Two emf s induced in the closed circuit each of value Blv. These two emf's are additive. So, Enet $$=$$ $$2Blv$$.

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