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JEE Main & Advanced Sample Paper JEE Main Sample Paper-34

  • question_answer
    The equation of progressive wave is: \[y=4\sin \left\{ \pi \left( \frac{t}{5}-\frac{x}{9} \right)+\frac{\pi }{6} \right\}\]where x and y are in cm. Which of the following statement is true?

    A)  \[\lambda =10cm\]

    B)  amplitude =0.04 cm

    C)  velocity v = 5 cm/s

    D)  frequency = f =20 Hz

    Correct Answer: A

    Solution :

    \[\lambda =\,\frac{2\pi }{k}=\frac{2\pi }{\left( \frac{\pi }{9} \right)}\,=18\] Where \[y=A\sin (\omega t-kx+\phi )\]


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