One conducting U tube can slide inside another as shown in figure, mai – McqOptions

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1.	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 l is the width of each tube, will be [AIEEE 2005]
A.	Zero
B.	\[2\,Blv\]
C.	\[Blv\]
D.	\[-Blv\]
Answer» C. \[Blv\]

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