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Question

Figure shows a magnetised needle P placed at a point O. The arrows show the direction of the magnetic moment. The other arrows show different positions (and orientations of the magnetic moment) of another identical magnetised needle Q. The dotted line represent a circle centre at the midpoint of P.
Which configuration in this system corresponds to stable equilibrium?
1498598_62b3b997faf04cb0b21df6d1fbe2c29a.png

A
PQ1, PQ3
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B
PQ3, PQ5
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C
PQ2, PQ4
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D
PQ2, PQ3
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Solution

The correct option is C PQ2, PQ4
PQ2 and PQ4
because they are opposite to each other.

1381150_1498598_ans_a6554310fdaa45f78122919a84ce8f90.png

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