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  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2002

  • question_answer
    Beat is listened by two sound sources of same amplitude and same frequency. Intensity of sound of maximum beat as compare to the intensity of any source will be

    A) equal

    B)  two times

    C)  four times

    D)  eight times

    Correct Answer: C

    Solution :

     Maximum amplitude \[=a+a=2a\] \[\therefore \] \[{{I}_{\max }}={{(2a)}^{2}}=4{{a}^{2}}\] \[I\propto {{a}^{2}}\] \[\therefore \] \[\frac{{{I}_{\max }}}{I}=\frac{4{{a}^{2}}}{{{a}^{2}}}=4:1\]


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