A thin magnetic needle oscillates in a horizontal plane with a period T. It is broken into n equals parts. The time period of each part will be

Options

A. T
B. `(T)/(n^(2))`
C. `Tn^(2)`
D. `(T)/(n)`

Explanation

`T=2pisqrt((I)/(MB))=2pisqrt((ml^(2)//12)/(m_(p)lB))orTpropml`
`(T')/(T)=(((m)/(n)(l)/(n))/(ml))^(1//2)orT'=(T)/(n)`