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Haryana PMT Haryana PMT Solved Paper-2009

  • question_answer
    In a stationary wave represented by \[\text{Y=2acoskxsin }\!\!\omega\!\!\text{ t}\]the intensity at a certain point is maximum when

    A)  \[\cos kx\] is maximum               

    B)  \[\cos kx\] is minimum

    C)  sin \[\omega t\] is maximum

    D)  sin \[\omega t\] is minimum

    Correct Answer: A

    Solution :

                    Intensity \[\propto {{(Amplitude)}^{2}}\]\[\propto {{(2a\,cos\,kx)}^{2}}\] Hence, intensity will be maximum when \[\cos \,kx\] is maximum.


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