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BHU PMT BHU PMT (Mains) Solved Paper-2005

  • question_answer
    The amplitude of a damped oscillator becomes one-half in 1 min. The amplitude after 3 min will be\[\frac{1}{n}\]time the original, where n is:

    A)  \[2\times 3\]                                    

    B)  \[{{2}^{3}}\]

    C)  \[{{3}^{2}}\]                                     

    D)  \[3\times {{2}^{2}}\]

    Correct Answer: B

    Solution :

                     Amplitude decays to\[\frac{1}{2}\times \frac{1}{2}\times \frac{1}{2}\]in 3 min. Hence,\[n={{2}^{3}}\].


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