A) Motion remains S.H.M. with time period = 2T
B) Motion remains S.H.M. with time period = 4T
C) Motion remains S.H.M. and period remains nearly constant
D) Motion remains S.H.M. with time period \[=\frac{T}{2}\]
Correct Answer: A
Solution :
As \[T\propto \sqrt{I},\]where I = moment of inertia \[=\frac{\omega {{L}^{2}}}{12}\Rightarrow T\propto \sqrt{w}\](w = Mass of magnet. If \[w\to \] quadrupled, then\[T\to \]doubled, i.e., \[T'=2T\]You need to login to perform this action.
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