CBSE Class 11 Physics Fluid Mechanics Quiz

Play the below CBSE Class 11 Physics Chapter 10 Mechanical Properties of Fluids Quiz with Answers. Quiz Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Mechanical Properties of Fluids Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

1. A wooden block of mass 8𝑘g is tied to a string attached to the bottom of the tank. In the equilibrium the block is completely immersed in water. If relative density of wood is 0.8 and 𝑔 = 10 𝑚𝑠−2, the tension 𝑇, in the string is
120N
100N
80N
20N

2. A metallic sphere of mass 𝑀 falls through glycerine with a terminal velocity 𝑣. If we drop a ball of mass 8𝑀 of same metal into a column of glycerine, the terminal velocity of the ball will be
2v
4v
8v
16v

3. After terminal velocity is reached, the acceleration of a body falling through a viscous fluid is
Zero
Equal to g
Less than g
More than g

4. There is hole of area 𝑎 at the bottom of a cylindrical of area 𝐴. Water is filled upto a height ℎ and water flows out in 𝑡 second. If water is filled to a height 4ℎ, it will flow out in time
4t
2t
t
0.25t

5. Spherical balls of radius ′𝑟′ are falling in a viscous fluid of viscosity 𝜂 with a velocity ′𝑣′. The retarding viscous force acting on the spherical ball is
Inversely proportional to 𝑟 but directly proportional to velocity 𝑣
Directly proportional to both radius 𝑟 and velocity 𝑣
Inversely proportional to both radius 𝑟 and velocity 𝑣
Directly proportional to 𝑟 but inversely proportional to 𝑣

6. A tank is filled with a liquid upto a height 𝐻. A small hole is made at the bottom of this tank. Consider 𝑡1 be the time taken to empty first half of the tank and 𝑡2 be the time taken to empty rest half of the tank. Then, determine the ratio 𝑡1/t2?
1.33
1.5
2
0.414

7. Water is flowing continuously from a tap having an internal diameter 8× 10−3m. The water velocity as it leaves the tap is 0.4 𝑚𝑠−1. The diameter of the water stream at a distance 2×10−1𝑚 below the tap is close to
5.0×10−3𝑚
7.5×10−3𝑚
9.6×10−3𝑚
3.6×10−3𝑚

8. In old age, arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from
Pascal’s law
Stoke’s law
Bernoulli’s principle
Archimede’s principle

9. A cubical block of wood of specific gravity 0.5 and chunk of concrete of specific gravity 2.5 are fastened together. The ratio of the mass of wood to the mass of concrete, which makes the combination to float with its entire volume submerged under water is
1/5
1/3
3/5
2/3

10. An ideal fluid flows through two pipes of circular cross-section with diameters 2.5cm and 3.75𝑐m connected one after another. The ratio of the velocities in the two pipes is
9:4
3:2
√3:√2
√2:√3



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