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Physics of Sound

  1. The amplitude of a pendulum executing simple harmonic motion falls to 1/3 the original value after 100 oscillations. The amplitude falls to S times the original value after 200 oscillations, where S is
    1. ​1/9
    2. 1/2
    3. 2/3
    4. 1/6
Correct Option: A

In harmonic oscillator, amplitude falls exponentially. ​

After 100 oscillations amplitude falls to
1
times. ​
3

∴ After next 100 oscillations i.e., after 200 oscillations amplitude falls to
1
2 =
1
times. ​
39



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