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Day 399: JEE Mains Physics

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

  1. Question 1

    Units and Measurements. Asked once: 30 Jan 2024 (same type asked 10 times) See all 10 of this type

    91
    If 50 Vernier divisions are equal to 49 main scale divisions of a travelling microscope and one smallest reading of main scale is 0.5 mm0.5\text{ }mm, the Vernier constant of travelling microscope is:

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  2. Question 2

    Moving Charges and Magnetism. Asked once: 2021 Paper 20 (same type asked 10 times) See all 10 of this type

    15
    Two ions of masses 4amu4amu and 16amu16amu have charges +2e+ 2e and +3e+ 3e respectively. These ions pass through the region of constant perpendicular magnetic field. The kinetic energy of both ions is same. Then:

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  3. Question 3

    Waves. Asked once: 11 Apr 2023 (same type asked 9 times) See all 9 of this type

    23
    The equation of wave is given by
    Y=10−2sin⁡2π(160t−0.5x+π4)Y =10^{- 2}\sin2\pi\left( 160t - 0.5x +\frac{\pi}{4} \right)
    Where xx and YY are in mm and tt in ss. The speed of the wave is___ kmh−1kmh^{- 1}

  4. Question 4

    Ray Optics. Asked once: 11 Apr 2023 (same type asked 9 times) See all 9 of this type

    22
    The radius of curvature of each surface of a convex lens having refractive index 1.8 is 20 cm20\text{ }cm. The lens is now immersed in a liquid of refractive index 1.5. The ratio of power of lens in air to its power in the liquid will be x:1x:1. The value of xx is___

  5. Question 5

    Electrostatics. Asked once: 25 Jan 2023 (same type asked 9 times) See all 9 of this type

    16
    A parallel plate capacitor has plate area 40 cm240{\text{ }cm}^{2} and plates separation 2 mm2\text{ }mm. The space between the plates is filled with a dielectric medium of a thickness 1 mm1\text{ }mm and dielectric constant 5. The capacitance of the system is:

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