The amplitude of a damped oscillator decreases to 0.9 times its original value in 5s. In another 10s it will decreases to a times its original magnitude, where alpha is:

The amplitude of a damped oscillator decreases to 0.9 times its origin

1.	The amplitude of a damped oscillator decreases to 0.9 times its original value in 5s. In another 10s it will decreases to a times its original magnitude, where alpha is:
Answer» 0.81 0.9 0.729 0.656 Answer :C