PYQ Vault

Day 34: MH HSC Class 12 Physics

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

  1. Question 1

    Magnetic Fields due to Electric Current. This type asked 2 times: Mar 2017, Feb 2020. This one: Feb 2020

    Q. 30
    State the advantages and disadvantages of a moving coil galvanometer. A moving coil galvanometer (M.C.G.) has 10 turns each of length 12 cm12\text{ cm} and breadth 8 cm8\text{ cm}. The coil of M.C.G. carries a current of 125μA125\mu\text{A} and is kept perpendicular to the uniform magnetic field of induction 10−2 T10^{- 2}\text{ T}. The twist constant of phosphor bronze fibre is 12×10−9 Nm/degree12 \times 10^{- 9}\text{ Nm/degree}. Calculate the deflection produced.

  2. Question 2

    Magnetic Fields due to Electric Current. This type asked 2 times: Mar 2018, Mar 2019. This one: Mar 2019

    Q. 24
    A cyclotron is used to accelerate protons to a kinetic energy of 5 MeV5\text{ MeV}. If the strength of magnetic field in the cyclotron is 2T2\text{T}, find the radius and the frequency needed for the applied alternating voltage of the cyclotron. (Given: Velocity of proton =3×107 m/s= 3 \times 10^{7}\text{ m/s}).

  3. Question 3

    Superposition of Waves. This type asked 2 times: Mar 2016, Mar 2019. This one: Mar 2019

    Q. 20
    Explain the reflection of transverse and longitudinal waves from a denser medium and rarer medium.

  4. Question 4

    Wave Optics. This type asked 2 times: Mar 2016, Mar 2018. This one: Mar 2018

    Q. 7(iv)
    The refractive indices of water and diamond are 43\frac{4}{3} and 2.42 respectively. Find the speed of light in water and diamond. (c=3×108 m/sc = 3 \times 10^{8}\text{ m/s}).

  5. Question 5

    Rotational Dynamics. This type asked 2 times: Mar 2016, Mar 2017. This one: Mar 2017

    Q. 2(vi)
    A solid sphere of mass 1 kg rolls on a table with linear speed 2 m/s, find its total kinetic energy.