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Day 45: JEE Mains Physics

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

  1. Question 1

    Gravitation. This type asked 4 times: 8 Apr 2023, 8 Apr 2024, 23 Jan 2025, 29 Jan 2025. This one: 29 Jan 2025 See all 4 of this type

    99
    Two planets, AA and BB are orbiting a common star in circular orbits of radii RAR_{A} and RBR_{B}, respectively, with RB=2RAR_{B}= 2R_{A}. The planet BB is 424\sqrt{2} times more massive than planet AA. The ratio (LBLA)\left( \frac{L_{B}}{L_{A}} \right) of angular momentum (LB)\left( L_{B} \right) of planet BB to that of planet A(LA)A\left( L_{A} \right) is closest to integer ____\_\_\_\_

  2. Question 2

    Ray Optics. This type asked 4 times: 27 Jun 2022, 13 Apr 2023, 22 Jan 2025, 29 Jan 2025. This one: 29 Jan 2025 See all 4 of this type

    82
    Two identical symmetric double convex lenses of focal length ff are cut into two equal parts L1, L2L_{1},{\text{ }L}_{2} by ABAB plane (containing the principal axis) and L3,L4L_{3},L_{4} by XYXY plane (perpendicular to the principal axis, through the centre) as shown in figure respectively. The ratio of focal lengths of lenses L1L_{1} and L3L_{3} is

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  3. Question 3

    Units and Measurements. This type asked 4 times: 14 Jun 2022, 25 Jul 2022, 27 Jan 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 4 of this type

    4
    The pair of physical quantities not having same dimensions is :

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  4. Question 4

    Atoms. This type asked 4 times: 2021 Paper 7, 30 Jan 2024, 5 Apr 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 4 of this type

    82
    The frequency of revolution of the electron in Bohr's orbit varies with n , the principal quantum number as

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  5. Question 5

    Current Electricity. This type asked 4 times: 2021 Paper 22, 1 Feb 2023, 24 Jan 2025, 28 Jan 2025. This one: 28 Jan 2025 See all 4 of this type

    15
    A wire of resistance RR is bent into an equilateral triangle and an identical wire is bent into a square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is

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