A) \[\frac{3}{8}T\]
B) \[\frac{5}{8}T\]
C) \[\frac{5}{12}T\]
D) \[\frac{7}{12}T\]
Correct Answer: C
Solution :
[c] Time to complete 1/4th oscillation is\[\frac{T}{4}\,s\]. Time to complete \[\frac{1}{8}th\] vibration from extreme position is obtained from \[y=\frac{a}{2}=a\,\,\cos \,\,\omega t=\frac{2\pi }{T}t\] or \[t=\frac{T}{6}s\] So time to complete 3/8th oscillation \[=\frac{T}{4}+\frac{T}{6}=\frac{5T\,}{12}\]
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