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Day 266: JEE Mains Physics

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

  1. Question 1

    Moving Charges and Magnetism. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    21
    A regular polygon of 6 sides is formed by bending a wire of length 4π4\pi meter. If an electric current of 4π3 A4\pi\sqrt{3}\text{ }A is flowing through the sides of the polygon, the magnetic field at the centre of the polygon would be x×10−7 Tx \times10^{- 7}\text{ }T. The value of xx is ____

  2. Question 2

    Ray Optics. Asked once: 11 Apr 2023 (same type asked 6 times) See all 6 of this type

    11
    The critical angle for a denser-rarer interface is 45∘45^{\circ}. The speed of light in rarer medium is 3×108 m s−13 \times10^{8}\ m\,s^{-1}. The speed of light in the denser medium is:

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  3. Question 3

    Atoms. Asked once: 11 Apr 2023 (same type asked 6 times) See all 6 of this type

    104
    The energy of He+He^{+} ion in its first excited state is. (The ground state energy for the Hydrogen atom is −13.6eV)- 13.6eV) :

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  4. Question 4

    Mechanical Properties of Solids. Asked once: 10 Apr 2023 (same type asked 6 times) See all 6 of this type

    106
    Young's moduli of the material of wires A and B are in the ratio of 1:41:4, while its area of cross sections are in the ratio of 1:31:3. If the same amount of load is applied to both the wires, the amount of elongation produced in the wires AA and BB will be in the ratio of [Assume length of wires A and B are same]

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  5. Question 5

    Thermodynamics. Asked once: 23 Jan 2025 (same type asked 6 times) See all 6 of this type

    9
    Match the List-I with List-II
    List-IList-II
    (A) Pressure varies inversely with volume of an ideal gas.(I) Adiabatic process
    (B) Heat absorbed goes partly to increase internal energy and partly to do work.(II) Isochoric process
    (C) Heat is neither absorbed nor released by a system(III) Isothermal process
    (D) No work is done on or by a gas(IV) Isobaric process
    Choose the correct answer from the options given below :

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