ElectroMagnetic InductionHard
Question
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 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
Options
A.BlV
B.-BlV
C.zero
D.2 BlV
Solution
= Einduced Φ = B.l.′AB′ (B and l is constant)
⇒ dΦ/dt = d′AB′/dt =2V
Einduced = 2BVl
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