KVPY Sample Paper KVPY Stream-SX Model Paper-21

  • question_answer
    The oscillations represented by curve 1 in the graph are expressed by equation \[x\text{ }=\text{ }A\text{ }sin\omega t.\]The equation for the oscillations represented by curve 2 is expressed as -

    A) \[x=2A\,\sin \,\,(\omega t-\pi /2)\]

    B) \[x=2A\,\sin \,\,(\omega t+\pi /2)\]

    C) \[x=-\,2A\,\sin \,\,(\omega t-\pi /2)\]

    D) \[x=A\sin \,\,(\omega t-\pi /2)\]

    Correct Answer: A

    Solution :

    Oscillations represented by curve 2 lags in phase by \[\pi /2\] and the periods are same. Amplitude of curve 2 is double that of 1.

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