JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Self Evaluation Test - Mechanical Properties of Fluids

  • question_answer
    In a cylindrical water tank, there are two small holes A and B on the wall at a depth of\[{{h}_{1}}\], from the surface of water and at a height of\[{{h}_{2}}\] from the bottom of water tank. Surface of water is at height of \[{{h}_{2}}\] from the bottom of water tank. Surface of water is at height H from the bottom of water tank. Water coming out from both holes strikes the ground at the same point S. Find the ratio of\[{{h}_{1}}\] and \[{{h}_{2}}\]       

    A) Depends on H

    B) \[1:1\]

    C) \[2:2\]

    D) \[1:2\]

    Correct Answer: C

    Solution :

    [c] Range is same for both holes \[\therefore \,\,\,\,\,\,2\sqrt{(H-{{h}_{1}}){{h}_{1}}}=1\sqrt{(H-{{h}_{2}}){{h}_{2}}}\] Squaring both sides, \[4(H-{{h}_{1}}){{h}_{1}}=4(H-{{h}_{2}}){{h}_{2}}\] \[H{{h}_{1}}-h_{1}^{2}=H{{h}_{2}}-h_{2}^{2}\] On solving we get, \[H={{h}_{1}}+{{h}_{2}}\] (not possible) and \[{{h}_{1}}-{{h}_{2}}=0\] Hence, the ratio of \[\frac{{{h}_{1}}}{{{h}_{2}}}=1:1\]


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