NCERT Solutions For Class 11 Physics Chapter 10: Mechanical Properties of Fluids

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NCERT Solutions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids are given in this article. Fluids are substances that can flow e.g., liquids and gases. It does not possess definite shape. When an object is submerged in a liquid at rest, the fluid exerts a force on its surface normally.

Class 11 Physics Chapter 10 Mechanical Properties of Fluids belongs to Unit 7 Properties of Bulk Matter which has a weightage of 20 marks in the Class 11 Examination along with Unit 8 and Unit 9. NCERT Solutions for Mechanical Properties of Fluids covers concepts of Pascal’s law, Archimedes Principle, and Viscosity.

Download PDF: NCERT Solutions for Class 11 Physics Chapter 10


NCERT Solutions for Class 11 Physics Chapter 10


Class 11 Physics Chapter 10 – Concepts Covered

  • Pressure is the thrust experienced per unit area of the surface of a liquid that is at rest.
The pressure at any point in the liquid depends on the depth (h) below the surface, density of liquid and acceleration due to gravity.
  • Pascal’s Law states that the pressure applied to an enclosed liquid is transmitted to every portion of the liquid and walls of the containing vessel.
\(P = {F \over A}\)
  • Archimedes Principle: When a body is either partially or fully immersed in a liquid, it loses some of its weight. The loss in the weight of the body is equal to the weight of the liquid that is displaced by the immersed part.
The upward force that’s exerted by the liquid displaced when a body is immersed is known as buoyancy
  • The energy possessed by a liquid by the virtue of its pressure is known as pressure energy.

Pressure energy of liquid in volume dV = PdV

  • Bernoulli’s Theorem: For an incompressible, irrotational, and non-viscous liquid with a streamlined flow, the sum of the kinetic energy, pressure energy, and potential energy per unit mass is a constant
\({P \over \rho} + {v^2 \over 2}+gh=constant\)

CBSE CLASS XII Related Questions

  • 1.

    Assertion (A): The deflection in a galvanometer is directly proportional to the current passing through it. 

    Reason (R): The coil of a galvanometer is suspended in a uniform radial magnetic field.

      • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
      • Assertion (A) is true, but Reason (R) is false.
      • Assertion (A) is false and Reason (R) is also false.

    • 2.
      In the given figure, three identical bulbs P, Q, and S are connected to a battery.
      three identical bulbs P, Q, and S

      [(i)] Compare the brightness of bulbs P and Q with that of bulb S when key K is closed.

      [(ii)] Compare the brightness of the bulbs S and Q when the key K is opened.
      Justify your answer in both cases.


        • 3.
          Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C), and (D) as given below.
          Assertion (A): In double slit experiment, if one slit is closed, diffraction pattern due to the other slit will appear on the screen.
          Reason (R): For interference, at least two waves are required.

            • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
            • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
            • Assertion (A) is true, but Reason (R) is false.
            • Both Assertion (A) and Reason (R) are false.

          • 4.

            Two slits 0.1 mm apart are arranged 1.20 m from a screen. Light of wavelength 600 nm from a distant source is incident on the slits. How far apart will adjacent bright interference fringes be on the screen? 


              • 5.
                In the figure, curved lines represent equipotential surfaces. A charge \( Q \) is moved along different paths A, B, C, and D. The work done on the charge will be maximum along the path:
                 curved lines represent equipotential surfaces

                  • A
                  • B
                  • C
                  • D

                • 6.
                  Two infinitely long conductors kept along XX' and YY' axes are carrying current \( I_1 \) and \( I_2 \) along -X axis and -Y axis respectively. Find the magnitude and direction of the net magnetic field produced at point P(X, Y).

                    CBSE CLASS XII Previous Year Papers

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