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Day 510: JEE Mains Physics

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

  1. Question 1

    Nuclei. Asked once: 24 Jan 2023

    22
    Assume that protons and neutrons have equal masses. Mass of a nucleon is 1.6×10−27 kg1.6 \times10^{- 27}\text{ }kg and radius of nucleus is 1.5×10−15 A1/3 m1.5 \times10^{- 15}{\text{ }A}^{1/3}\text{ }m. The approximate ratio of the nuclear density and water density is n×1013n \times10^{13}. The value of nn is

  2. Question 2

    Oscillations. Asked once: 8 Apr 2023

    92
    For particle PP revolving round the centre OO with radius of circular path rr and angular velocity ω\omega, as shown in below figure, the projection of OP on the xx-axis at time tt is

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  3. Question 3

    Ray Optics. Asked once: 29 Jan 2025

    8
    At the interface between two materials having refractive indices n1n_{1} and n2n_{2}, the critical angle for reflection of an em wave is θ1c\theta_{1c}. The n2n_{2} material is replaced by another material having refractive index n3n_{3}, such that the critical angle at the interface between n1n_{1} and n3n_{3} materials is θ2c\theta_{2c}. If n3>n2>n1n_{3}>n_{2}>n_{1}; n2n3=25\frac{n_{2}}{n_{3}}=\frac{2}{5} and sin⁡θ2C−sin⁡θ1C=12\sin\theta_{2C}- \sin\theta_{1C}=\frac{1}{2}, then θ1C\theta_{1C} is

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  4. Question 4

    Semiconductor Electronics. Asked once: 22 Jan 2026 S2

    10
    The correct truth table for the given input data of the following logic gate is :

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  5. Question 5

    System of Particles and Rotational Motion. Asked once: 7 Apr 2025

    21
    A,B and C are disc, solid sphere and spherical shell respectively with same radii and masses. These masses are placed as shown in figure. The moment of inertia of the given system about PQ is X15I\frac{X}{15}I, where I is the moment of inertia of the disc about its diameter. The value of xx is .