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Day 412: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 1 Feb 2024 (same type asked 10 times) See all 10 of this type

    20
    A monochromatic light of wavelength 6000Å6000\text{Å} is incident on the single slit of width 0.01 mm0.01\text{ }mm. If the diffraction pattern is formed at the focus of the convex lens of focal length 20 cm20\text{ }cm, the linear width of the central maximum is:

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  2. Question 2

    Units and Measurements. Asked once: 29 Jul 2022 (same type asked 10 times) See all 10 of this type

    19
    A travelling microscope has 20 divisions per cmcm on the main scale while its Vernier scale has total 50 divisions and 25 Vernier scale divisions are equal to 24 main scale divisions, what is the least count of the travelling microscope?

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  3. Question 3

    Moving Charges and Magnetism. Asked once: 2021 Paper 11 (same type asked 10 times) See all 10 of this type

    11
    An alpha particle and a deuteron enter a region of magnetic field which is perpendicular to their velocity. If their kinetic energies are equal, then find the ratio of their radii.

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  4. Question 4

    Waves. Asked once: 10 Apr 2023 (same type asked 9 times) See all 9 of this type

    26
    A transverse harmonic wave on a string is given by y(x,t)=5sin⁡(6t+0.003x)y(x,t) = 5\sin(6t + 0.003x) where xx and yy are in cmcm and tt in sec. The wave velocity is__ ms−1ms^{- 1}.

  5. Question 5

    Ray Optics. Asked once: 28 Jul 2022 (same type asked 9 times) See all 9 of this type

    106
    The power of a lens (biconvex) is 1.25 m−11.25{\text{ }m}^{- 1} in particular medium. Refractive index of the lens is 1.5 and radii of curvature are 20 cm20\text{ }cm and 40 cm40\text{ }cm respectively. The refractive index of surrounding medium:

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