A) 0.75 sec
B) 1.5 sec
C) 3 sec
D) 6 sec
Correct Answer: C
Solution :
\[T\propto \frac{1}{\sqrt{M}}\Rightarrow \frac{{{T}_{1}}}{{{T}_{2}}}=\sqrt{\frac{{{M}_{2}}}{{{M}_{1}}}}\Rightarrow \frac{1.5}{{{T}_{2}}}=\sqrt{\frac{{{M}_{1}}/4}{{{M}_{1}}}}=\frac{1}{2}\] \[\Rightarrow {{T}_{2}}=3\sec \]
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