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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 T. The magnet is cut along its length into three parts and these parts are then placed together. The time period of this combination will be

A

2s

B

`2/3s`

C

`2sqrt3s`

D

`2//sqrt3s`

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