Are these practice questions for Mechanical Properties Of Fluids based on the CBSE pattern?

Yes. Every practice question is modeled on the CBSE Class 11 - Science Physics exam pattern — including MCQs, assertion-reason questions, and short-answer formats that frequently appear in CBSE papers.

Are the practice questions for Mechanical Properties Of Fluids free?

Yes. Every chapter includes free practice questions for Class 11 - Science students to get you started.

What types of questions are included?

The practice set for Mechanical Properties Of Fluids mainly includes MCQs and CBSE-style short-answer questions, with instant feedback on each answer. For full-length textbook practice, use the NCERT Solutions page.

Are the practice questions suitable for board exam preparation?

Yes. The questions test the same concepts and depth that CBSE asks in board exams. After finishing, also solve the NCERT and NCERT Exemplar exercises for Mechanical Properties Of Fluids for full coverage.

How many practice questions are there for Mechanical Properties Of Fluids?

The number scales with chapter length and concept density. Each chapter typically has 15-50 practice questions across MCQ and short-answer formats.

Mechanical Properties Of Fluids Class 11 Physics Practice Questions with Answers

easy

Examine why blowing over a piece of paper held horizontally under your lip causes the paper to rise.

Try solving it in your notebook first, then check the solution.

easy

Justify why a liquid drop, free from external forces like gravity, assumes a spherical shape.

Try solving it in your notebook first, then check the solution.

easy

Recall the mathematical formula for the gauge pressure at a depth

h

below the surface of a liquid with density

\rho

.

Try solving it in your notebook first, then check the solution.

easy

Name the principle that explains the operation of hydraulic machines like a hydraulic lift.

Try solving it in your notebook first, then check the solution.

easy

A large open tank has a small hole at a depth of

5.0

m from the surface of the water. Apply Torricelli's law to calculate the speed of efflux of water from the hole. (Use

g = 9.8 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

easy

Define pressure and identify its SI unit.

Try solving it in your notebook first, then check the solution.

easy

Water flows through a horizontal pipe of non-uniform cross-section. At a point where the radius of the pipe is

2.0

cm, the velocity of water is

3.0 \text{ m/s}

. Calculate the velocity of water at a point where the radius is

1.0

cm.

Try solving it in your notebook first, then check the solution.

easy

Justify why pressure in a fluid is a scalar quantity, even though it is defined as force per unit area, and force is a vector.

Try solving it in your notebook first, then check the solution.

medium

Define the term 'angle of contact' as it relates to a liquid surface in contact with a solid.

Try solving it in your notebook first, then check the solution.

medium

State the equation of continuity for an incompressible fluid in steady flow and explain what physical principle it represents. Describe how the speed of the fluid changes as it flows through a pipe of varying cross-section.

Try solving it in your notebook first, then check the solution.

medium

Analyze the effect of temperature on the viscosity of fluids. Contrast the behavior of liquids and gases when their temperature increases.

Try solving it in your notebook first, then check the solution.

medium

Evaluate the two diagrams shown in Exercise 9.15 of the source document. Justify which diagram correctly represents the steady flow of a non-viscous liquid and why the other is incorrect.

Try solving it in your notebook first, then check the solution.

medium

State and explain Pascal's law. Describe with the help of a diagram how this law is applied in a hydraulic lift.

Try solving it in your notebook first, then check the solution.

medium

Critique the statement: "Bernoulli's principle applies to all instances of fluid motion." Justify your assessment by discussing the key assumptions made in its derivation.

Try solving it in your notebook first, then check the solution.

medium

In a hydraulic lift, the radius of the smaller piston is

4.0

cm and that of the larger piston is

20.0

cm. Calculate the force that must be applied to the smaller piston to lift a car of mass

1500

kg. (Use

g = 10 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

medium

Formulate a scientific explanation for why adding detergent to water enhances its ability to clean greasy fabrics. Your explanation must be based on the concepts of surface tension and angle of contact.

Try solving it in your notebook first, then check the solution.

medium

Explain why the pressure in a fluid at rest is the same at all points located at the same horizontal level.

Try solving it in your notebook first, then check the solution.

medium

A cylindrical block of mass

25

kg and base radius

5

cm rests on a horizontal floor. Calculate the pressure the block exerts on the floor. (Use

g = 9.8 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

medium

A submarine is at a depth of

500

m in the ocean. Calculate the gauge pressure and the absolute pressure at this depth. (Density of sea water

\rho = 1.03 \times 10^3 \text{ kg/m}^3

, atmospheric pressure

P_a = 1.01 \times 10^5 \text{ Pa}

, and

g = 10 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

medium

State Bernoulli's principle and write its mathematical equation.

Try solving it in your notebook first, then check the solution.

medium

Justify why it is more effective to control the flow rate of an injection using the size of the syringe needle rather than the thumb pressure exerted.

Try solving it in your notebook first, then check the solution.

medium

Identify the property of a fluid that is responsible for the internal resistance to its flow.

Try solving it in your notebook first, then check the solution.

medium

Propose a design for a hydraulic lift system that uses Pascal's law to lift a

2000

kg vehicle using a maximum input force of only

500

N. Formulate the required ratio of the piston areas and justify your design choice.

Try solving it in your notebook first, then check the solution.

medium

Analyze why a small drop of liquid, free from external forces like gravity, assumes a spherical shape.

Try solving it in your notebook first, then check the solution.

medium

Explain the phenomenon of capillary rise. Recall the expression for the height to which a liquid rises in a capillary tube and list the factors on which this height depends.

Try solving it in your notebook first, then check the solution.

medium

Calculate the excess pressure inside a soap bubble of radius

4.00

mm. The surface tension of the soap solution is

2.50 \times 10^{-2} \text{ N/m}

.

Try solving it in your notebook first, then check the solution.

medium

A 50 kg person stands on a single circular stiletto heel of radius

0.5

cm. A circus performer has a 50 kg plank placed on their chest, and a 5000 kg elephant stands on the plank. The performer is unharmed. Critique the physics that explains the performer's safety, and formulate a calculation to compare the pressure in both scenarios.

Try solving it in your notebook first, then check the solution.

medium

Calculate the height to which water will rise in a glass capillary tube of radius

0.25

mm. (Surface tension of water

S = 0.0727 \text{ N/m}

, density of water

\rho = 1000 \text{ kg/m}^3

, angle of contact

\theta = 0^\circ

, and

g = 9.8 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

medium

Compare the pressure at the top and bottom surfaces of an airplane wing during flight and analyze how this difference generates lift, using Bernoulli's principle.

Try solving it in your notebook first, then check the solution.

medium

A submarine is at a depth of

500

m. The interior is maintained at sea-level atmospheric pressure. Propose a method to calculate the net force on a circular viewport of radius

0.2

m. Justify your steps and perform the calculation. (Use density of seawater

\rho = 1.03 \times 10^3 \text{ kg/m}^3

,

P_a = 1.01 \times 10^5 \text{ Pa}

, and

g = 9.8 \text{ m/s}^2

).

Try solving it in your notebook first, then check the solution.

medium

Describe the key differences between streamline flow and turbulent flow of a fluid.

Try solving it in your notebook first, then check the solution.

medium

An engineer is designing an open-tube manometer to measure pressure differences in a gas line. Propose which liquid, mercury or colored water, should be used for measuring (a) very small pressure differences and (b) large pressure differences. Justify your proposals.

Try solving it in your notebook first, then check the solution.

medium

A student claims that the formula for capillary rise,

h = \frac{2S \cos\theta}{a\rho g}

, can be used to calculate the height change for any liquid in any capillary tube. Critique this claim, specifically for the case of mercury in a clean glass tube.

Try solving it in your notebook first, then check the solution.

hard

Analyze the motion of a spinning cricket ball in air to explain why it deviates from a parabolic path. Apply Bernoulli's principle in your explanation.

Try solving it in your notebook first, then check the solution.

hard

Evaluate the common explanation that the curve of a spinning cricket ball (Magnus effect) is due to the pressure difference predicted by Bernoulli's principle. Justify whether this principle alone is sufficient to explain the phenomenon.

Try solving it in your notebook first, then check the solution.

hard

Explain, using the concept of surface energy, why a small liquid drop under no external forces assumes a spherical shape.

Try solving it in your notebook first, then check the solution.

hard

Design an experiment to verify Bernoulli's principle for a horizontal pipe of varying cross-section. Justify your choice of apparatus, outline the procedure, and formulate the relationship you would expect to observe between pressure and velocity.

Try solving it in your notebook first, then check the solution.

hard

Explain the concept of viscosity. Define the coefficient of viscosity, and state its SI unit and dimensions. Summarize how the viscosity of liquids and gases changes with temperature.

Try solving it in your notebook first, then check the solution.

hard

Explain the concepts of surface tension and surface energy. Summarize the steps to show the relationship between the force due to surface tension and the surface energy per unit area for a liquid film.

Try solving it in your notebook first, then check the solution.

hard

Design a simple experiment to determine the coefficient of viscosity of honey using Stokes' law. Formulate the necessary equation and evaluate two potential sources of significant error in your proposed method.

Try solving it in your notebook first, then check the solution.

hard

Calculate the terminal velocity of a steel ball of radius

2.0

mm falling through glycerine. (Density of steel

\rho = 8.0 \times 10^3 \text{ kg/m}^3

, density of glycerine

\sigma = 1.3 \times 10^3 \text{ kg/m}^3

, viscosity of glycerine

\eta = 0.83 \text{ Pa s}

, and

g = 9.8 \text{ m/s}^2

)

Try solving it in your notebook first, then check the solution.

hard

Examine the hydrostatic paradox. Why does the force on the bottom of three vessels with the same base area and filled to the same height with a liquid remain the same, even if the vessels hold different amounts of liquid?

Try solving it in your notebook first, then check the solution.

hard

Propose the pressure required to blow a hemispherical bubble of radius

2.0

mm at the end of a capillary tube dipped

10.0

cm below the surface of a soap solution. The surface tension of the solution is

2.50 \times 10^{-2} \text{ N/m}

, its density is

1.20 \times 10^3 \text{ kg/m}^3

, and atmospheric pressure is

1.01 \times 10^5 \text{ Pa}

. Justify your formula for the total pressure.

Try solving it in your notebook first, then check the solution.

hard

A swimmer is at a depth of

10 \text{ m}

below the surface of a lake. Recall the formula for absolute pressure and calculate its value. Use atmospheric pressure

P_a = 1.01 \times 10^5 \text{ Pa}

, density of water

\rho = 1000 \text{ kg/m}^3

, and acceleration due to gravity

g = 9.8 \text{ m/s}^2

.

Try solving it in your notebook first, then check the solution.

hard

A horizontal pipe carries water in a streamline flow. At a point along the pipe where the cross-sectional area is

10 \text{ cm}^2

, the water velocity is

1 \text{ m/s}

and the pressure is

2000

Pa. Calculate the pressure at another point where the cross-sectional area is

5 \text{ cm}^2

. The density of water is

1000 \text{ kg/m}^3

.

Try solving it in your notebook first, then check the solution.

Mechanical Properties Of FluidsClass 11 Physics Practice Questions