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Day 259: JEE Mains Physics

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

  1. Question 1

    Thermodynamics. Asked once: 2021 Paper 23 (same type asked 7 times) See all 7 of this type

    27
    A sample of gas with γ=1.5\gamma= 1.5 is taken through an adiabatic process in which the volume is compressed from 1200 cm31200{\text{ }cm}^{3} to 300 cm3300{\text{ }cm}^{3}. If the initial pressure is 200kPa200kPa. The absolute value of the workdone by the gas in the process is ____\_\_\_\_ J.

  2. Question 2

    Nuclei. Asked once: 27 Jan 2024 (same type asked 7 times) See all 7 of this type

    25
    In a nuclear fission process, a high mass nuclide (A≈236)(A \approx 236) with binding energy 7.6 MeV/Nucleon dissociated into middle mass nuclides (A≈118(A \approx 118 ), having binding energy of 8.6MeV/8.6MeV/ Nucleon. The energy released in the process would be _______ MeVMeV.

  3. Question 3

    Alternating Current. Asked once: 24 Jan 2026 S1 (same type asked 7 times) See all 7 of this type

    9
    For the series LCR circuit connected with 220 V , 50 Hz a.c source as shown in the figure, the power factor is α10\frac{\alpha}{10}. The value of α\alpha is ____\_\_\_\_

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  4. Question 4

    Atoms. Asked once: 6 Apr 2024 (same type asked 7 times) See all 7 of this type

    3
    The ratio of the shortest wavelength of Balmer series to the shortest wavelength of Lyman series for hydrogen atom is:

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  5. Question 5

    Ray Optics. Asked once: 28 Jan 2026 S1 (same type asked 7 times) See all 7 of this type

    11
    The magnitudes of power of a biconvex lens (refractive index 1.5) and that of a Plano-concave lens (refractive index =1.7= 1.7 ) are same. If the curvature of plano-concave lens exactly matches with the curvature of back surface of the biconvex lens, then ratio of radius of curvature of front and back surface of the biconvex lens is ____\_\_\_\_.

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