Fluid Mechanics: NEET Physics Previous Year Questions

236 previous year questions from Fluid Mechanics. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $The gauge pressure at a depth of 50 m in a sea is (Density of sea water is 1025 kg m^{- 3} and g = 10 ms^{- 2})$
2. $A small sphere of radius r falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere atta\dots$
3. $An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4 cm and 4.8 cm, respec\dots$
4. $What is the terminal velocity of a rain drop of radius 0.02 mm ? [Note that the coefficient of viscosity of air is 1.8 \times \dots$
5. $If 1000 droplets of water of surface tension 0.07 N/m. having same radius 1 mm each, combine to from a single drop. In the process the released surface energy is- (Take\dots$
6. $The value of tension in a long thin metal wire has been changed from T1 to T_{2} . The lengths of the metal wire at two different values of tension T1 and T1 are\dots$
7. $A small liquid drop of radius R is divided into 27 identical liquid drops. If the surface tension is T, then the work done in the process will be:$
8. $A sphere of relative density σ and diameter D has concentric cavity of diameter d . The ratio of \frac{D}{d}, if it just floats on water in a tank is:$
9. $A tank of oil has height of 4 m and density of 850 kg m^{- 3} . The gauge pressure at the bottom of the tank is\dots$
10. $A small hole of area of cross-section 2 mm^{2} is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m / s^{2}, the\dots$
11. $A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water? (Given: density of water\dots$
12. $A bullet of mass 5 g, travelling with a speed of 210 m / s, strikes a fixed wooden target. One half of its kinetic energy is converted into heat in the bullet while the\dots$
13. $A spherical body of radius r and density σ falls freely through a viscous liquid having density ρ and viscosity η and attains a terminal velocit\dots$
14. $The pressure at the bottom of a liquid tank is not proportional to the$
15. $A meniscus drop of radius 1 cm is sprayed into 10^{6} droplets of equal size. Calculate the energy expended if surface tension of mercury is\dots$
16. $Three liquids of densities ρ_{1}, ρ_{2} and ρ_{3} (with ρ_{1} > ρ_{2} > ρ_{3}), having the same value of surface tension T, rise to the same height in three i\dots$
17. $The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r . If the speed of the liquid in the tube is v, the speed\dots$
18. $A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is 0.07 N / m, then the excess force required to\dots$
19. $A large number of water drops, each of radius r, combine to have a drop of radius R . If the surface tension is T and mechanical equivalent of heat is J, the r\dots$
20. $A horizontal pipeline carrying gasoline has a cross sectional diameter of 5 mm . If the viscosity and density of the gasoline are 6 \times 10^{- 3} Pois\dots$
21. $A body of volume V floats on water with \frac{1}{3} of its volume above the surface. The volume of the object above the surface when floating on a liquid of specifi\dots$
22. $A spherical ball of radius 1 \times 10^{- 4} m and density 10^{5} kg / m^{3} falls freely under gravity through a distance h before entering\dots$
23. $In a well pressure at a point 10 m below the surface of water is (g = 10 ms^{- 2})$
24. $The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly (surface tension of soap solution = 0.03 N m^{- 1}) [NEET\dots$
25. $A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 \times 10^{- 2} N / m . The pressure inside the bubble equals\dots$

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Fluid Mechanics: NEET Physics Previous Year Questions

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