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NEET Sample Paper NEET Sample Test Paper-54

  • question_answer
    A wave travels in a medium according to the equation of displacement given by \[y\,\,=\,\,0.03\text{ }sin\,\pi \left( 2t-0.0\text{1}x \right)\] where y and x are in metres and t in seconds. The wavelength of the wave is-

    A) 200 m

    B)               100 m

    C) 20 m                

    D) 10 m

    Correct Answer: A

    Solution :

    Convert into \[y\,\,=\,\,0.03\,\,\sin \,\,2\pi \,\,\left( t-\frac{0.01}{2}x \right)\] \[\Rightarrow \,\,\,K\,\,=\,\,2\pi \,\left( \frac{0.01}{2} \right)\] \[\lambda =\frac{2\pi }{K}\] \[\lambda =\frac{2}{0.01}\,m\] \[\lambda =200\,m\]


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