Two magnets A ancl B are identicai and these are aranged as shown in the figure. Their length is negligible incomparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance d1 and d2 will be
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a
2 tanθ1/3
b
2 tanθ-1/3
c
2 cotθ1/3
d
2 cotθ-1/3
answer is C.
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Detailed Solution
In equilibrium, B1=B2 tanθ⇒μ04π.2Md13=μ04π.Md23tan θ⇒d1d2=2 cotθ1/3
Two magnets A ancl B are identicai and these are aranged as shown in the figure. Their length is negligible incomparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance d1 and d2 will be