JEE Main & Advanced
JEE Main Paper (Held on 10-4-2019 Morning)
question_answer
The displacement of a damped harmonic oscillator is given by \[x(t)={{e}^{-01.1t}}\cos (10\pi t+\phi ).\]Here t is in seconds. The time taken for its amplitude of vibration to drop to half of its initial value is close to: [JEE Main 10-4-2019 Morning]