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  3. Chhattisgarh PMT

Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2009

  • question_answer
     In a stationary wave represented by \[y=2a\,\cos kx\,\sin \,\omega t\]the intensity at a certain point is maximum when

    A)  cos toe is maximum

    B)  cos toe is minimum

    C)  sin cot is maximum

    D)  sin cot 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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