The length, breadth and mass of two bar magnets are same but their magnetic moments are 3M and 2M respectively. These are joined pole to pole and are suspended by a string. When oscillated in a magnetic field of strength B, the time period obtained is 5s. If the poles of either of the magnets are reverse then the time period of the combination in the same magnetic field will be –

Options

A. `3sqrt(3)s`
B. `2sqrt(2)s`
C. `5sqrt(5)s`
D. `1s`

Explanation

`T=2pisqrt((I)/(MB))orTprop(1)/(sqrt(M))`
`(T_(1))/(T_(2))=sqrt((3M-2M)/(3M+2M))orT_(2)=5sqrt(5)s`