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NEET Sample Paper NEET Sample Test Paper-92

  • question_answer
    When a wave travels in a medium the particles displacement is given by the equation y = 0.03 \[\sin \,\pi (2t-0.01x),\] where x and y are in seconds. The wavelength of the wave is

    A) 200 m

    B)        100 m

    C) 20 m                

    D)        10 m

    Correct Answer: A

    Solution :

    [a] \[y=0.03\,\,\sin \pi (2t-0.01x)\] is equation of a progressive wave. Comparing it with the standard form of equation \[y=a\,\sin \,(\omega \,t-kx)\] \[\omega =2\,\pi \,;\]\[k=0.01\,\,\pi \] \[k=\frac{2\pi }{\lambda }=0.01\pi \] \[\Rightarrow \]\[\lambda =\frac{2}{0.01}=200\,\,m.\]


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