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NEET Sample Paper NEET Sample Test Paper-45

  • question_answer
    Water flows through a horizontal pipe line of varying cross-section at the rate of\[0.2\text{ }{{m}^{3}}\,{{s}^{-1}}\]. The velocity of water at a point for the area of cross-section of the pipe is 0.02 m2 is-

    A) 10\[m{{s}^{-1}}\]                   

    B) 10 \[mm{{s}^{-1}}\]

    C) 10.9 \[cm{{s}^{-1}}\]              

    D) \[\infty \]

    Correct Answer: A

    Solution :

    \[\frac{\Delta V}{\Delta t}\,\,=\,Av\] \[\Rightarrow \,\,\,\,.2=.02\text{ }v\] \[\Rightarrow \,\,\,\,v=\frac{.2}{.02}=10\text{ }m/s\]


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