The displacement of a damped oscillator is x(t) = exp(-0.2t)cos (3.2t+\(\emptyset\)) where t is time in second. The time required for the amplitude of the oscillator to become \(\frac{1}{e^12}\) times its initial amplitude is
The displacement of a damped oscillator is x(t) = exp(-0.2t)cos (3.2t+\(\emptyset\)) where t is time in second. The time required for the amplitude of the oscillator to become \(\frac{1}{e^12}\) times its initial amplitude is
1
3 s
2
6 s
3
2 s
4
8 s