Two magnets placed one above the other oscillates with a period of ...

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Two magnets placed one above the other oscillates with a period of \( 6 \mathrm{sec} \). If one of them is reversed, the time period becomes \( 2 \mathrm{sec} \). The ratio of their magnetic moment is nearest to
(1) \( 7 / 3 \)
(2) \( 5 / 4 \)
(3) \( 7 / 4 \)
(4) \( 7 / 5 \)
\( \mathrm{P} \)
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