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Two bar magnets having same geometry wit...

Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way what their similar poles are same side then its time period of oscillation is` T_1`. Now the polarity of one of the magnet is reversed then time period of oscillation will be

A

`T_1 lt T_2`

B

`T_1gtT_2`

C

`T_1 = T_2`

D

`T_2 = infty`

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