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Day 126: JEE Mains Physics

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

  1. Question 1

    Current Electricity. This type asked 2 times: 27 Jan 2024, 5 Apr 2024. This one: 5 Apr 2024 See all 2 of this type

    119
    A wire of resistance 20Ω20\Omega is divided into 10 equal parts. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is ________ Ω\Omega.

  2. Question 2

    Electromagnetic Waves. This type asked 2 times: 15 Apr 2023, 5 Apr 2024. This one: 5 Apr 2024 See all 2 of this type

    104
    Match List-I with List-II :
    List-I (EM-Wave)List-II (Wavelength Range)
    (A)Infra-red(I)<10−3 nm<10^{-3}\text{ }nm
    (B)Ultraviolet(II)400 nm400\text{ }nm to 1 nm1\text{ }nm
    (C)X-rays(III)1 mm1\text{ }mm to 700 nm700\text{ }nm
    (D)Gamma rays(IV)1 nm1\text{ }nm to 10−3 nm10^{-3}\text{ }nm
    Choose the correct answer from the options given below:

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  3. Question 3

    Moving Charges and Magnetism. This type asked 2 times: 2021 Paper 21, 5 Apr 2024. This one: 5 Apr 2024 See all 2 of this type

    8
    In a co-axial straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero ____\_\_\_\_.

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  4. Question 4

    Electrostatics. This type asked 2 times: 13 Apr 2023, 4 Apr 2024. This one: 4 Apr 2024 See all 2 of this type

    21
    An infinite plane sheet of charge having uniform surface charge density +σsC/m2+\sigma_{s}C/m^{2} is placed on x−yx - y plane. Another infinitely long line charge having uniform linear charge density +λeC/m+\lambda_{e}C/m is placed at z=4 mz = 4\text{ }m plane and parallel to yy-axis. If the magnitude values ∣σs∣=2∣λe∣\left| \sigma_{s} \right|= 2\left| \lambda_{e} \right| then at point (0,0,2)(0,0,2), the ratio of magnitudes of electric field values due to sheet charge to that of line charge is πn:1\pi\sqrt{n}:1. The value of nn is ______.

  5. Question 5

    Laws of Motion. This type asked 2 times: 30 Jan 2024, 4 Apr 2024. This one: 4 Apr 2024 See all 2 of this type

    103
    A 2 kg2\text{ }kg brick begins to slide over a surface which is inclined at an angle of 45∘45^{\circ} with respect to horizontal axis. The co-efficient of static friction between their surfaces is:

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