A) 2 s
B) 5 s
C) 7 s
D) 3.5 s
Correct Answer: D
Solution :
\[E'=\frac{1}{2}\] \[b=\frac{\lambda }{m}\] \[A={{A}_{0}}{{e}^{-bt}}\] \[a'=\frac{a}{\sqrt{2}}\] \[\lambda =bm\] \[\frac{1}{\sqrt{2}}\,={{e}^{-\frac{t}{10}}}\] \[b=\frac{1}{10}\,\sqrt{2}\,={{e}^{\frac{1}{10}}}\] \[\ln \,\sqrt{2}\,=\frac{t}{20}\]You need to login to perform this action.
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