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Day 158: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 5 Apr 2024 (same type asked 6 times) See all 6 of this type

    21
    In Young's double slit experiment, carried out with light of wavelength 5000Å5000\text{Å}, the distance between the slits is 0.3 mm0.3\text{ }mm and the screen is at 200 cm200\text{ }cm from the slits. The central maximum is at x=0 cmx = 0\text{ }cm. The value of xx for third maxima is .......... mmmm.

  2. Question 2

    System of Particles and Rotational Motion. Asked once: 31 Jan 2023 (same type asked 6 times) See all 6 of this type

    22
    A solid sphere of mass 1 kg1\text{ }kg rolls without slipping on a plane surface. Its kinetic energy is 7×10−3 J7 \times10^{- 3}\text{ }J. The speed of the centre of mass of the sphere is____ cms−1cms^{- 1}

  3. Question 3

    Work, Energy and Power. Asked once: 9 Apr 2024 (same type asked 6 times) See all 6 of this type

    119
    A force (3x2+2x−5)N\left( 3x^{2}+ 2x- 5 \right)N displaces a body from x=2 mx = 2\text{ }m to x=4 mx = 4\text{ }m. Work done by this force is ______ JJ.

  4. Question 4

    Dual Nature of Radiation and Matter. Asked once: 29 Jul 2022 (same type asked 6 times) See all 6 of this type

    16
    The kinetic energy of emitted electron is EE when the light incident on the metal has wavelength λ\lambda. To double the kinetic energy, the incident light must have wavelength:

    Tap an option to check your answer.

  5. Question 5

    Mechanical Properties of Fluids. Asked once: 24 Jan 2023 (same type asked 6 times) See all 6 of this type

    120
    A Spherical ball of radius 1 mm1\text{ }mm and density 10.5 g/cc10.5\text{ }g/cc is dropped in glycerine of coefficient of viscosity 9.8 poise and density 1.5 g/cc1.5\text{ }g/cc. Viscous force on the ball when it attains constant velocity is 3696×3696 \times 10−x N10^{- x}\text{ }N. The value of xx is ____\_\_\_\_. (Given, g=9.8 m/s2g = 9.8\text{ }m/s^{2} and π=227\pi =\frac{22}{7} )