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AMU Medical AMU Solved Paper-1996

  • question_answer
    Some examples of periodic motion are 1. A seconds pendulum 2. Human pulse, 3, Alternating current 4. Earths rotation about its own axis. 5. Moon moving round the earth. Which of the following sequence arranges the time periods of these motions in correct increasing order?

    A)  \[1\text{ }2\text{ }3\text{ }4\text{ }5\]    

    B)  \[2\text{ }1\text{ }3\text{ }4\text{ }5\]

    C)  \[3\text{ }2\text{ }4\text{ }1\text{ }5\]  

    D)  \[3\text{ }2\text{ }1\text{ }4\text{ }5\]

    Correct Answer: D

    Solution :

    : (1) In seconds pendulum, T= 2 sec (2) For human pulse,\[n=\frac{72}{60}\]pulse per sec \[\therefore \] \[T=\frac{60}{72}=0.83sec\] (3) For alternating current, frequency = 50 Hz \[\therefore \] \[T=\frac{1}{50}=0.02\,\sec \] (4) Fop-earths rotation about its own axis, T = 24 hours (5) For moon moving round earth,\[T=27.3\]days Ascending order\[=3,\text{ }2,\text{ }1,\text{ }4,\text{ }5\]


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