One conducing U tube can be 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 speed v, then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be ........

One conducing U tube can be slide inside another as shown in figure, m

1.	One conducing U tube can be 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 speed v, then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be ........
Answer» zero 2Blv Blv `-Blv` SOLUTION : INDUCED emf DUE to bothh TUBES , `epsilon=Bvl + Bvl` `THEREFORE epsilon` =2Bvl (both batteries tubes considered as in series )

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