NCERT Solutions For Class 11 Physics Chapter 11: Thermal Properties of Matter

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NCERT Solutions for Class 11 Physics Chapter 11 Thermal Properties of Matter are given in the article. The matter is the one due to which a matter exhibits heat conductivity or it is the property that decides the nature of the matter in the presence of heat. Thus, thermal properties are exhibited by objects when heat passes through them. Temperature is one of the physical properties of matter.

Class 11 Physics Chapter 11 Thermal Properties of Matter belongs to Unit 7 Properties of Bulk Matter which along with Unit 8 and Unit 9 has a weightage of 20 marks. NCERT Solutions for Chapter 11 Class 11 Physics covers concepts of specific heat capacityLatent heat formula, and Blackbody Radiation.

Download PDF: NCERT Solutions for Class 11 Physics Chapter 11


NCERT Solutions for Class 11 Physics Chapter 11


Class 11 Physics Chapter 11 – Concepts Covered

  • The thermal energy of a body is the quantity of heat that is required to raise the temperature of the whole body by a unit degree. If Q is the amount of heat that’s needed to produce a temperature change (Δt), then the thermal capacity of the substance is given as:
\(S = {Q \over \bigtriangleup t}\)
  • The Specific Heat Capacity of a substance is the amount of heat that is required to raise the temperature of a unit mass of a substance by 1° C. 
\(S = {1 \over m} {Q \over \bigtriangleup t}\)
From the law of energy conservation: Heat gained by one body = heat lost by the other
  • The Basic Heat Formula: The heat Q that is required to raise the temperature of a substance with mass m of specific heat capacity s through t degrees is given by

Q = m x S x t

  • Newton’s law of cooling states that the rate of loss of heat in a body is proportional to the difference in temperature of the body and its surroundings provided that the difference in temperature is small and is not more than 40° C.

\({dT \over dt} = -K(T-T_s)\)

The negative sign implies that as time passes, the temperature decreases.


CBSE CLASS XII Related Questions

  • 1.
    Light of which of the following colours will have the maximum energy in a photon associated with it?

      • Red light
      • Yellow light
      • Green light
      • Blue light

    • 2.
      The figure represents the variation of the electric potential \( V \) at a point in a region of space as a function of its position along the x-axis. A charged particle will experience the maximum force at:

        • P
        • Q
        • R
        • S

      • 3.
        Nuclides with the same number of neutrons are called:

          • Isobars
          • Isotones
          • Isotopes
          • Isomers

        • 4.
          The energy of an electron in an orbit in hydrogen atom is \( -3.4 \, \text{eV} \). Its angular momentum in the orbit will be:

            • \( \dfrac{3h}{2\pi} \)
            • \( \dfrac{2h}{\pi} \)
            • \( \dfrac{h}{\pi} \)
            • \( \dfrac{h}{2\pi} \)

          • 5.
            A circular coil of 100 turns and radius \( \left(\frac{10}{\sqrt{\pi}}\right) \, \text{cm}\) carrying current of \( 5.0 \, \text{A} \) is suspended vertically in a uniform horizontal magnetic field of \( 2.0 \, \text{T} \). The field makes an angle \( 30^\circ \) with the normal to the coil. Calculate:
            the magnetic dipole moment of the coil, and
            the magnitude of the counter torque that must be applied to prevent the coil from turning.


              • 6.
                Assertion : In Young’s double-slit experiment, the fringe width for dark and bright fringes is the same. Reason (R): Fringe width is given by \( \beta = \frac{\lambda D}{d} \), where symbols have their usual meanings.

                  • 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.
                CBSE CLASS XII Previous Year Papers

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