A) \[\frac{1}{2}\]
B) \[\frac{1}{30}\]
C) 2
D) \[\frac{1}{15}In\,3\]
Correct Answer: D
Solution :
[d] As we know, \[E={{E}_{0}}{{e}^{-\frac{bt}{m}}}\] \[15=45{{e}^{-\frac{b15}{m}}}\Rightarrow \frac{1}{3}={{e}^{-\frac{b15}{m}}}\] [As no. of oscillations = 15 so t = 15 sec] Taking log on both sides \[\frac{b}{m}=\frac{1}{15}ln\,\,3\]You need to login to perform this action.
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