The four wire loops shown in figure have vertical edge lengths of either L,2L, or 3L. They will move with the same speed into a region of uniform magnetic field B→ directed out of the page. Rank them according to the maximum magnitude of the induced emf greatest to least.

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1 and 2 tie, then 3 and 4 tie

3 and 4 tie, then 1 and 2 tie

4, 2, 3, 1

4 then 2 and 3 will be close, and then 1

answer is D.

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Detailed Solution

Induced emf depends upon vertical edge.Vertical edge of (4) is longest and (1) has shortest.Vertical edge of (2) and (3) is same.

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