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Day 268: JEE Mains Physics

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

  1. Question 1

    Kinetic Theory. Asked once: 27 Jan 2024 (same type asked 6 times) See all 6 of this type

    20
    The average kinetic energy of a monatomic molecule is 0.414eV0.414eV at temperature: (Use KB=1.38×10−23 J/KK_{B} = 1.38 \times 10^{- 23}\text{ }J/K)

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  2. Question 2

    Wave Optics. Asked once: 25 Jan 2023 (same type asked 6 times) See all 6 of this type

    14
    In Young's double slits experiment, the position of 5th 5^{\text{th~}} bright fringe from the central maximum is 5 cm5\text{ }cm. The distance between slits and screen is 1 m1\text{ }m and wavelength of used monochromatic light is 600 nm600\text{ }nm. The separation between the slits is:

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  3. Question 3

    System of Particles and Rotational Motion. Asked once: 29 Jan 2023 (same type asked 6 times) See all 6 of this type

    26
    A solid sphere of mass 2 kg2\text{ }kg is making pure rolling on a horizontal surface with kinetic energy 2240 J2240\text{ }J. The velocity of centre of mass of the sphere will be____ ms−1ms^{- 1}

  4. Question 4

    Work, Energy and Power. Asked once: 15 Apr 2023 (same type asked 6 times) See all 6 of this type

    29
    A block of mass 10 kg10\text{ }kg is moving along xx-axis under the action of force F=5xNF = 5xN. The work done by the force in moving the block from x=2 mx = 2\text{ }m to 4 m4\text{ }m will be___ J.

  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 28 Jun 2022 (same type asked 6 times) See all 6 of this type

    107
    Let K1K_{1} and K2K_{2} be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength λ1\lambda_{1} and λ2\lambda_{2}, respectively are incident on a metallic surface. If λ1=3λ2\lambda_{1}= 3\lambda_{2} then:

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