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MGIMS WARDHA MGIMS WARDHA Solved Paper-2012

  • question_answer
    To hear the echo in 1 s, the minimum distance of the source from the reflecting surface should be

    A)  28m                                     

    B)  18m

    C)  19m                                     

    D)  165m

    Correct Answer: D

    Solution :

                    Distance of source from reflecting surface \[d=\frac{vt}{2}\] where, \[v=\]velocity of sound, \[t=\]time of echo                 \[d=\frac{330\times 1}{2}\]                 \[=165m\]


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