PYQ Vault

Day 46: MH HSC Class 12 Physics

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

  1. Question 1

    Thermodynamics. Asked once: Jun 2025 (same type asked 2 times)

    Q. 26
    A Carnot engine receives 4000J of heat from a reservoir at 500K, does some work, rejects 2000J heat to reservoir at 200K. (a) How much work does it do? (b) What is its efficiency?

  2. Question 2

    AC Circuits. Asked once: Feb 2025 (same type asked 2 times)

    Q. 10
    In a series LCR circuit, if resistance, inductive reactance and capacitive reactance are 3Ω3\Omega, 8Ω8\Omega and 4Ω4\Omega respectively, calculate phase difference between voltage and current.

  3. Question 3

    AC Circuits. Asked once: Mar 2018 (same type asked 2 times)

    Q. 6(vi)
    A capacitor of capacitance 0.5μF0.5\mu\text{F} is connected to a source of alternating e.m.f. of frequency 100 Hz. What is the capacitive reactance? (π=3.142\pi = 3.142)

  4. Question 4

    Electrostatics. Asked once: Feb 2025 (same type asked 2 times)

    Q. 1(iv)
    Electric potential 'V' at a distance 'r' from a point charge is directly proportional to _____.

    Tap an option to check your answer.

  5. Question 5

    Kinetic Theory of Gases and Radiation. Asked once: Feb 2024 (same type asked 2 times)

    Q. 30
    Draw a neat labelled diagram of Ferry's perfectly black body. Compare the rms speed of hydrogen molecules at 227°C with rms speed of oxygen molecule at 127°C. Given that molecular masses of hydrogen and oxygen are 2 and 32 respectively.