A bar magnet is placed with its North pole pointing North. Neutral point is at 12 cm. Another magnet is now placed on the first magnet, then the neutral point is found to be at 8 cm. The ratio of their magnetic moments is
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A bar magnet is placed with its North pole pointing North. Neutral point is at 12 cm. Another magnet is now placed on the first magnet, then the neutral point is found to be at 8 cm. The ratio of their magnetic moments is