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Magnetic Field

The figure sh...

Question

The figure shows the various positions [labelled subscripts] of small magnetised needles P and Q. The arrows show the direction of their magnetic moment. Which configuration corresponds to the lowest potential energy of all the configurations shown?

A

$P Q_{3}$

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B

$P Q_{4}$

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C

$P Q_{5}$

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D

$P Q_{6}$

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Solution

The correct option is D
$P Q_{6}$

For lowest potential energy configuration magnetic moments should be parallel

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