A bar magnet suspended freely in uniform magnetic field is vibrating with a time period of `3` seconds. If the initial field str

A bar magnet suspended freely in uniform magnetic field is vibrating with a time period of `3` seconds. If the initial field strength is `2T`. Then the final field strength, for which time period becomes `4` seconds is
A. `1.125`Tesla`
B. `0.625`Tesla`
C. `3.55` Tesla
D. `0.75` Tesla

A bar magnet suspended freely in uniform magnetic field is vibrating with a time period of `3` seconds. If the initial field strength is `2T`. Then th

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