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Day 100: JEE Mains Physics

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

  1. Question 1

    Magnetism and Matter. Asked 2 times: 27 Jul 2022*, 12 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    23
    A compass needle oscillates 20 times per minute at a place where the dip is 30∘30^{\circ} and 30 times per minute where the dip is 60∘60^{\circ}. The ratio of total magnetic field due to the earth at two place respectively is 4x\frac{4}{\sqrt{x}}. The value of xx is

  2. Question 2

    Dual Nature of Radiation and Matter. Asked 2 times: 2021 Paper 13*, 11 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    102
    The ratio of the de-Broglie wavelengths of proton and electron having same kinetic energy: (Assume mp=me×1849m_{p}=m_{e}\times 1849 )

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  3. Question 3

    Nuclei. Asked 2 times: 25 Jan 2023*, 11 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    113
    A nucleus disintegrates into two nuclear parts, in such a way that ratio of their nuclear sizes is 1:21/31:2^{1/3}. Their respective speed have a ratio of n:1n:1. The value of nn is___

  4. Question 4

    Nuclei. Asked 2 times: 2021 Paper 24, 11 Apr 2023 See all 2 times it was asked

    20
    Two radioactive elements AA and BB initially have same number of atoms. The half life of AA is same as the average life of BB. If λA\lambda_{A} and λB\lambda_{B} are decay constants of A and B respectively, then choose the correct relation from the given options.

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  5. Question 5

    Motion in a Straight Line. Asked 2 times: 25 Jan 2023*, 10 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    91
    A person travels xx distance with velocity v1v_{1} and then xx distance with velocity v2v_{2} in the same direction. The average velocity of the person is vv, then the relation between v,v1v,v_{1} and v2v_{2} will be:

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