JEE Main & Advanced Physics Wave Mechanics Question Bank Graphical Questions

  • question_answer
    The displacement-time graphs for two sound waves A and B are shown in the figure, then the ratio of their intensities \[{{I}_{A}}/{{I}_{B}}\] is equal to

    A)            1 : 4                                          

    B)            1 : 16

    C)            1 : 2                                          

    D)            1 : 1

    Correct Answer: D

    Solution :

                       Intensity µ\[{{a}^{2}}{{\omega }^{2}}\] here \[\frac{{{a}_{A}}}{{{a}_{B}}}=\frac{2}{1}\] and \[\frac{{{\omega }_{A}}}{{{\omega }_{B}}}=\frac{1}{2}\]Þ \[\frac{{{I}_{A}}}{{{I}_{B}}}={{\left( \frac{2}{1} \right)}^{2}}\times {{\left( \frac{1}{2} \right)}^{2}}=\frac{1}{1}\]


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