PYQ Vault

Day 8: MH HSC Class 12 Physics

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

  1. Question 1

    Semiconductor Devices. Asked 2 times: Feb 2020, Feb 2026

    Q. 21
    With a neat circuit diagram, explain the working of a full wave rectifier. Draw input-output waveforms.

  2. Question 2

    Structure of Atoms and Nuclei. Asked 2 times: Mar 2022, Feb 2026

    Q. 6
    Derive an expression for radius of nthn^{\text{th}} Bohr orbit.

  3. Question 3

    Structure of Atoms and Nuclei. Asked 2 times: Feb 2020*, Feb 2026 (* = numbers or wording changed that year)

    Q. 26
    Energy of an electron in second Bohr orbit is −3.4-3.4 eV. Calculate its kinetic energy and potential energy in third Bohr orbit.

  4. Question 4

    Thermodynamics. Asked 2 times: Feb 2025, Feb 2026

    Q. 23
    0.5 mole of an ideal gas at 300 K, expands isothermally from an initial volume of 2 L to a final volume of 6 L. Calculate : (a) work done by the gas (b) heat supplied to the gas [ Given : R=8.31R = 8.31 J mol−1^{-1} K−1^{-1} ]

  5. Question 5

    Wave Optics. Asked 2 times: Feb 2024, Feb 2026

    Q. 31
    Using analytical method, obtain an expression for the fringe width of two interfering waves.