A) 4 sec
B) 2 sec
C) 1 sec
D) 1/2 sec
Correct Answer: C
Solution :
\[T\propto \frac{1}{\sqrt{M}}\Rightarrow T\propto \frac{1}{\sqrt{m}}\]; If\[m\to 4\]times. \[T\to \frac{1}{2}\]times i.e. \[{{T}^{'}}=\frac{T}{2}=\frac{2}{2}=1\sec \]
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