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A hope and a solid cylinder of same mass and radius are made of a permanent magnetic material with their magnetic moment parallel to their respective axes. But the magnetic moment of hoop is twice of solid cylinder. They are placed in a uniform magnetic field in such a manner that their magnetic moments make a small angle with the field. If the oscillation periods of hoop and cylinder are T h and T c respectively, then -

1. T h = 1.5 T c
2. T h = T c
3. T h = 2T c
4. T h = 0.5T c

Correct answer: T h = T c

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