PYQ Vault

Day 11: MH HSC Class 12 Physics

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

  1. Question 1

    Structure of Atoms and Nuclei. Asked 2 times: Jul 2024*, Feb 2025 (* = numbers or wording changed that year)

    Q. 22
    An electron in hydrogen atom stays in its second orbit for 10−810^{-8} s. How many revolutions will it make around the nucleus in that time? [ Given : e=1.6×10−19e = 1.6 \times 10^{-19} C, m=9.1×10−31m = 9.1 \times 10^{-31} kg ]

  2. Question 2

    Wave Optics. Asked 2 times: Mar 2017, Feb 2025

    Q. 29
    Distinguish between interference and diffraction of light. A double slit arrangement produces interference fringes for sodium light of wavelength 589 nm, that are 0.20 degree apart. What is the angular fringe separation if the entire arrangement is immersed in water? ( R.I. of water = 1.33 )

  3. Question 3

    Current Electricity. Asked 2 times: Feb 2024*, Jul 2024 (* = numbers or wording changed that year)

    Q. 10
    A galvanometer has a resistance of 100Ω100\Omega and its full scale deflection current is 0.2 mA, what resistance should be added to it to have a range of 0-10V?

  4. Question 4

    Magnetic Fields due to Electric Current. Asked 2 times: Feb 2024, Jul 2024

    Q. 6
    Explain Biot and Savart's law with suitable diagram.

  5. Question 5

    Semiconductor Devices. Asked 2 times: Feb 2023, Jul 2024

    Q. 1(iv)
    An LED emits light when its ____

    Tap an option to check your answer.