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Day 23: JEE Mains Physics

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

  1. Question 1

    Kinetic Theory. This type asked 5 times: 25 Jun 2022, 29 Jan 2023, 29 Jan 2025, 3 Apr 2025, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 5 of this type

    22
    A gas of certain mass filled in a closed cylinder at a pressure of 3.23 kPa has temperature 50∘C50^{\circ}C. The gas is now heated to double its temperature. The modified pressure is ____\_\_\_\_ Pa.

  2. Question 2

    Magnetism and Matter. This type asked 5 times: 26 Jun 2022, 31 Jan 2023, 4 Apr 2024, 6 Apr 2024, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 5 of this type

    21
    A short bar magnet placed with its axis at 30∘30^{\circ} with an external field of 800 Gauss, experiences a torque of 0.016 N.m. The work done in moving it from most stable to most unstable position is α×10−3 J\alpha \times 10^{- 3}\text{ }J. The value of α\alpha is ____\_\_\_\_ .

  3. Question 3

    Thermal Properties of Matter. This type asked 5 times: 2021 Paper 13, 2021 Paper 24, 31 Jan 2023, 8 Apr 2023, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 5 of this type

    14
    A brass wire of length 2 m and radius 1 mm at 27∘C27^{\circ}C is held taut between two rigid supports. Initially it was cooled to a temperature of −43∘C-43^{\circ}C creating a tension T in the wire. The temperature to which the wire has to be cooled in order to increase the tension in it to 1.4 T , is ____\_\_\_\_  ∘C\ ^{\circ}C

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  4. Question 4

    Units and Measurements. This type asked 5 times: 2021 Paper 17, 2021 Paper 19, 6 Apr 2024, 23 Jan 2025, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 5 of this type

    1
    Match the List-I with List-II
    List-IList-II
    (A) Magnetic induction(I) MLT−2A−2MLT^{-2}A^{-2}
    (B) Magnetic flux(II) ML2T−2A−2ML^{2}T^{-2}A^{-2}
    (C) Magnetic permeability(III) ML0T−2A−1ML^{0}T^{-2}A^{-1}
    (D) Self inductance(IV) ML2T−2A−1ML^{2}T^{-2}A^{-1}
    Choose the correct answer from the options given below:

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  5. Question 5

    Electromagnetic Waves. This type asked 5 times: 25 Jun 2022, 31 Jan 2023, 6 Apr 2024, 4 Apr 2025, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 5 of this type

    18
    The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k=3k = 3 and permeability of μ=2μ0\mu = 2\mu_{0}, is ( μ0=\mu_{0}= permeability of vacuum)

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