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A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is \( 2^{5 / 4} \mathrm{sec} \). One of the magnets is removed and if the other magnet oscillates in the same field, then the time period in second is
(1) \( 2^{\frac{1}{4}} \)
(2) \( 2^{\frac{1}{2}} \)
(3) 2
(4) \( 2^{\frac{5}{4}} \)
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