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FLUID MECHANICS QUIZ-10

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 


Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 


Q1. There are two identical small holes on the opposite sides of a tank containing a liquid. The tank is open at the top. The difference in height between the two holes is h. As the liquid comes out of the two holes, the tank will experience a net horizontal force proportional to

  •  h1/2
  •  h3/2
  •  h
  •  h2
Solution

Q2.A bigger drop of radius R is converted into n smaller drops of radius r, the required energy is
  •  (4 πr2 n-4 π R2 )T
  •  (4/3 πr2 n-4/3 π R3 )T
  •  (4 πR2-4 π r2 )nT
  •  (n4 πr2-n4 π R2 )T
Solution

Q3.  Why the dam of water reservoir is thick at the bottom
  •  Quantity of water increases with depth
  •  Density of water increases with depth
  •  Pressure of water increases with depth
  •  Temperature of water increases with depth
Solution
Q4. A spherical drop of water has 1 mm radius. If the surface tension of water is 70×〖10-3 Nm-1, then the difference of pressure between inside and outside of the spherical drop is
  •  35 Nm-2
  •  70 Nm-2
  •  140 Nm-2
  •  Zero
Solution

Q5.The level of water in a tank is 5 m high. A hole of area 10 cm2 is made in the bottom of the tank. The rate of leakage of water from the hole is
  •  10-2 m3 s-1
  •  102 m3 s-1
  •  10 m3 s-1
  •  10-2 m-3 s-1
Solution
 

Q6. One end of a uniform glass capillary tube of radius r=0.025 cm is immersed vertically in water to a depth h=1 cm. The excess pressure in Nm-2 required to blow an air bubble out of the tube (Surface tension of water = 7×10-2 Nm-1, Density of water = 103 kg m-3 , Acceleration due to gravity= 10ms-2
  •  0.0048×105
  •  0.0066×105
  • 1.0048×105
  •  1.0066×105
Solution

Q7.A uniform long tube is bent into a circle of radius R and it lies in a vertical plane. Two liquids of same volume but densities ρ and δ fill half the tube. The angle θ is

  •  tan-1⁡((ρ-δ)/(ρ+δ))
  •  tan-1⁡〖ρ/δ〗
  •  tan-1⁡〖δ/ρ〗
  •  tan-1⁡((ρ+δ)/(ρ-δ))
Solution

Q8.A piece of wood if floating in water. When the temperature of water rises, the apparent weight of the wood will
  •  Increase
  •  Decrease
  •  May increase or Decrease
  •  Remain same
Solution


Q9.The surface tension of a liquid is 5 Nm^(-1). If a film is held on a ring of area 0.02 m^2, its total surface energy is about
  •  2×10-2 J
  •  2.5×10-2 J
  •  2×10-1 J
  •  3×10-1 J
Solution

Q10. Two pieces of metal when immersed in a liquid have equal upthrust on them; then
  •  Both pieces must have equal weights
  •  Both pieces must have equal densities
  •  Both pieces must have equal volumes
  • Both are floating to the same depth
Solution
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