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CMC Medical CMC-Medical VELLORE Solved Paper-2011

  • question_answer
    A wave travelling along a stretched string is represented by y= 3 cos\[\pi \](100 t - x). Its wavelength is

    A)  3 cm                                     

    B)  100 cm

    C)  2 cm                                     

    D)  5 cm

    E)  8 cm

    Correct Answer: C

    Solution :

                     Compare with the standard from \[y=r\cos \left[ \frac{2\pi t}{T}-\frac{2\pi x}{\lambda } \right]\] We have\[\frac{2\pi }{\lambda }=\pi \]or \[\lambda =2\,cm\]


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