The amplitude of a damped oscillator decreases to 0.9 times its original magnitude is 5s. In another 10s it will decrease to α times its original magnitude, where α equals.
Text Solution
Verified by ExpertsThe correct answer is:
C
A = A 0 
after 5 second
0.9A 0 = A 0 
...(i)
After 10 more second
A = A 0 
...(ii)
From (i) & (ii)
A = 0.729 A 0
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