A vibration magnetometer consists of two identical bar magnets plac...

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