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JEE Main & Advanced Physics Wave Mechanics Question Bank Basics of Mechanical Waves

  • question_answer
    Ultrasonic signal sent from SONAR returns to it after reflection from a rock after a lapse of 1 sec. If the velocity of ultrasound in water is 1600 ms?1, the depth of the rock in water is                                            [JIPMER 2000]

    A)            300 m                                      

    B)            400 m

    C)            500 m                                      

    D)            800 m

    Correct Answer: D

    Solution :

                       If d is the distance of rock from SONAR then            \[2d=vt\]Þ \[d=\frac{v\times t}{2}=\frac{1600\times 1}{2}=800m\]


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