PYQ Vault

Day 21: MH HSC Class 12 Physics

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

  1. Question 1

    Electromagnetic Induction. This type asked 3 times: Mar 2017, Jul 2024, Feb 2026. This one: Feb 2026

    Q. 30
    Define : (i) Self inductance (ii) Mutual inductance A conducting loop of area 1m21\text{m}^{2} is placed normal to a uniform magnetic field of 3 Wb/m23\ \text{Wb/m}^{2}. If the magnetic field is uniformly reduced to 1 Wb/m21\ \text{Wb/m}^{2} in 0.5 second, calculate the induced e.m.f. produced in the coil.

  2. Question 2

    Kinetic Theory of Gases and Radiation. This type asked 3 times: Mar 2018, Jul 2024, Feb 2026. This one: Feb 2026

    Q. 13
    Calculate the temperature at which the average kinetic energy of a molecule of a gas will be same as that of an electron accelerated through 1 volt. [ Given: kB=1.4×10−23k_B = 1.4 \times 10^{-23} J/k, e=1.6×10−19e = 1.6 \times 10^{-19}C ]

  3. Question 3

    Mechanical Properties of Fluids. This type asked 3 times: Mar 2022, Jul 2024, Feb 2026. This one: Feb 2026

    Q. 12
    A steel ball with radius 0.3 mm is falling with velocity of 2 m/s through a tube filled with glycerine. Calculate viscous force acting on the steel ball. [ Given : ηglycerine=0.833 Ns/m2\eta_{glycerine} = 0.833\ Ns/m^{2} ]

  4. Question 4

    Semiconductor Devices. This type asked 3 times: Feb 2020, Feb 2025, Feb 2026. This one: Feb 2025

    Q. 12
    Draw a neat and labelled circuit diagram for a full wave rectifier.

  5. Question 5

    Structure of Atoms and Nuclei. This type asked 3 times: Mar 2022, Feb 2023, Feb 2026. This one: Feb 2023

    Q. 1(x)
    The radius of eighth orbit of electron in H-atom will be more than that of fourth orbit by a factor of _______.

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