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

`2/3s`

`sqrt(2/3)`

`2/3s`

`sqrt(3/2)s`

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