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The length of a magnet is large compared...

The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is ` 2 s`. The magnet is cut along its length into three equal parts and these parts are then placed on each other with their like poles together . The time period of this combination will be

A

`2/(sqrt3)S`

B

`2/3S`

C

`2sqrt(3) S`

D

`2S`

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The correct Answer is:
B
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