A) \[\frac{9}{10}\,T\]
B) \[T\sqrt{\frac{10}{9}}\]
C) unchanged
D) \[T\sqrt{\frac{9}{10}}\]
Correct Answer: B
Solution :
\[T=2\pi \sqrt{\frac{\ell }{g}}\] In a liquid \[T'=2\pi \sqrt{\frac{\ell }{g\left\{ 1-\frac{1}{\sigma } \right\}}}\] \[\sigma =\frac{density\,\,of\,\,bob}{density\,\,of\,\,liquid}\] \[\sigma =10\] \[T'=2\pi \sqrt{\frac{\ell }{g\left\{ 1-\frac{1}{\sigma } \right\}}}\,\,=\,\,2\pi \sqrt{\frac{\ell }{g}}\,\sqrt{\frac{10}{9}}\] \[T'=T\sqrt{\frac{10}{9}}\]You need to login to perform this action.
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