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Physics-

General

Easy

Question

In the loops shown, all curved sections are either semicircles or quarter circles. All the loops carry the same current. The magnetic fields at the centres have magnitudes B₁ , B₂ , B₃ and B₄

$B_{4}$ is maximum.
$B_{3}$ is minimum
$B_{4} > B_{1} > B_{2} > B_{3}$
$B_{1} > B_{4} > B_{3} > B_{2}$

The correct answer is: $B subscript 4 end subscript$ is maximum.

In B₁ and B₄ M.F. add up. In B₂ and B₃ , M.F. oppose each other.

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