AIIMS AIIMS Solved Paper-2007

  • question_answer
    A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of

    A)  1000     

    B)                        10000                  

    C)        10                         

    D)        100

    Correct Answer: D

    Solution :

    Let intensity of sound be \[{{i}_{2}}>{{i}_{3}}>{{i}_{1}}\] and \[{{i}_{2}}>{{i}_{1}}>{{i}_{3}}\]. Loudness of sound initially \[{{i}_{1}}>{{i}_{2}}>{{i}_{3}}\] Later,    \[{{i}_{1}}>{{i}_{3}}>{{i}_{2}}\] Given,  \[\sqrt{30}\] \[\beta \]   \[\beta \] \[k\Omega \]


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