Question

One conducting u tube can slide inside another as shown in gure maintaining electrical contacts between the tubes. The magnetic eld b is perpendicular to the plane of the gure. 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 intext:zigya cbse

Answer 1

Answer:

The total emf induced across each of the U tube is: ∫

0

π

BvRsinθdθ=2BvR=Bv(2R)=Bvl (since l=2R)

The positive terminal of induced emf of u tube on left is at the top while that of right is at bottom.

Hence, the net emf induced is 2Bvl.

Answer 2

Explanation:

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