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Day 4: JEE Mains Physics

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

  1. Question 1

    Electrostatics. This type asked 9 times: 2021 Paper 5, 25 Jun 2022, 28 Jul 2022, 25 Jan 2023, 6 Apr 2023, 10 Apr 2023, 8 Apr 2024, 21 Jan 2026 S1, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 9 of this type

    9
    A parallel plate capacitor with plate separation 5 mm is charged by a battery. On introducing a mica sheet of 2 mm and maintaining the connections of the plates with the terminals of the battery, it is found that it draws 25%25\% more charge from the battery. The dielectric constant of mica is ____\_\_\_\_ .

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  2. Question 2

    Kinetic Theory. This type asked 9 times: 2021 Paper 18, 2021 Paper 21, 11 Apr 2023, 12 Apr 2023, 30 Jan 2024, 1 Feb 2024, 6 Apr 2024, 28 Jan 2025, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 9 of this type

    5
    The r.m.s speed of oxygen molecules at 47∘C47^{\circ}C is equal to that of the hydrogen molecules kept at ____\_\_\_\_  ∘C\ ^{\circ}C. (Mass of oxygen molecule/mass of hydrogen molecule=32/2)

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  3. Question 3

    Kinetic Theory. This type asked 9 times: 2021 Paper 7, 2021 Paper 8, 25 Jun 2022, 26 Jul 2022, 24 Jan 2023, 25 Jan 2023, 22 Jan 2025, 2 Apr 2025, 7 Apr 2025. This one: 7 Apr 2025 See all 9 of this type

    13
    Match the List-I with List-II
    List-IList-II
    A. Triatomic rigid gasI. CPCV=53\frac{C_{P}}{C_{V}} = \frac{5}{3}
    B. Diatomic non-rigid gasII. CPCV=75\frac{C_{P}}{C_{V}} = \frac{7}{5}
    C. Monoatomic gasIII. CPCV=43\frac{C_{P}}{C_{V}} = \frac{4}{3}
    D. Diatomic rigid gasIV. CPCV=97\frac{C_{P}}{C_{V}} = \frac{9}{7}
    Choose the correct answer from the options given below :

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  4. Question 4

    Current Electricity. This type asked 9 times: 2021 Paper 26, 25 Jun 2022, 26 Jun 2022, 28 Jul 2022, 24 Jan 2023, 25 Jan 2023, 12 Apr 2023, 4 Apr 2024, 6 Apr 2024. This one: 6 Apr 2024 See all 9 of this type

    26
    A wire of resistance RR and radius rr is stretched till its radius became r/2r/2. If new resistance of the stretched wire is xRxR, then value of xx is _____

  5. Question 5

    Dual Nature of Radiation and Matter. This type asked 8 times: 2021 Paper 12, 2021 Paper 15, 25 Jul 2022, 11 Apr 2023, 31 Jan 2024, 24 Jan 2026 S2, 2 Apr 2026 S1, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 8 of this type

    18
    K1K_{1} and K2K_{2} be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength λ1\lambda_{1} and λ2\lambda_{2}, respectively. If λ1=2λ2\lambda_{1}= 2\lambda_{2} then the work function of material is given by :

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