PYQ Vault

Day 15: MH HSC Class 12 Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Superposition of Waves. Asked 2 times: Mar 2017*, Mar 2018 (* = numbers or wording changed that year)

    Q. 4. OR B
    The wavelengths of two sound waves in air are 81173 m\frac{81}{173}\text{ m} and 81170 m\frac{81}{170}\text{ m}. They produce 10 beats per second. Calculate the velocity of sound in air.

  2. Question 2

    Mechanical Properties of Fluids. Asked 2 times: Mar 2016*, Mar 2017 (* = numbers or wording changed that year)

    Q. 3(iii)
    The total energy of free surface of a liquid drop is 2π2\pi times the surface tension of the liquid. What is the diameter of the drop? [Assume all terms in SI unit].

  3. Question 3

    Wave Optics. This type asked 6 times: Mar 2016, Mar 2018, Mar 2019, Mar 2022, Feb 2023, Feb 2024. This one: Feb 2024

    Q. 1(x)
    In biprism experiment, the distance of 20th20^{\text{th}} bright band from the central bright band is 1.2 cm. Without changing the experimental set-up, the distance of 30th30^{\text{th}} bright band from the central bright band will be _____.

    Tap an option to check your answer.

  4. Question 4

    Rotational Dynamics. This type asked 5 times: Mar 2018, Mar 2022, Feb 2024, Jun 2025, Jun 2026. This one: Jun 2026

    Q. 1(i)
    The MI of ring of radius RR and mass MM about its central axis is _____

    Tap an option to check your answer.

  5. Question 5

    Superposition of Waves. This type asked 5 times: Mar 2018, Mar 2019, Feb 2020, Jul 2024, Jun 2026. This one: Jul 2024

    Q. 16
    Show that all harmonics are present in case of a stretched string.