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Day 230: JEE Mains Physics

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

  1. Question 1

    Laws of Motion. Asked once: 27 Jul 2022 (same type asked 2 times) See all 2 of this type

    3
    Sand is being dropped from a stationary dropper at a rate of 0.5kgs−10.5kgs^{- 1} on a conveyor belt moving with a velocity of 5 ms−15{\text{ }ms}^{- 1}. The power needed to keep belt moving with the same velocity will be:

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  2. Question 2

    Electrostatics. Asked once: 24 Jan 2025 (same type asked 2 times) See all 2 of this type

    1
    Consider a parallel plate capacitor of area A (of each plate) and separation 'd' between the plates. If E is the electric field and ε0\varepsilon_{0} is the permittivity of free space between the plates, then potential energy stored in the capacitor is :-

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  3. Question 3

    System of Particles and Rotational Motion. Asked once: 28 Jul 2022 (same type asked 2 times) See all 2 of this type

    112
    The distance of centre of mass from end AA of a one- dimensional rod (AB) having mass density ρ=ρ0(1−x2L2)kg/m\rho =\rho_{0}\left( 1 -\frac{x^{2}}{L^{2}} \right)kg/m and length LL (in meter) is 3 Lαm\frac{3\text{ }L}{\alpha}m. The value of α\alpha is (where xx is the distance from end AA )

  4. Question 4

    System of Particles and Rotational Motion. Asked once: 14 Jun 2022 (same type asked 2 times) See all 2 of this type

    30
    A metre scale is balanced on a knife edge at its centre. When two coins, each of mass 10 g10\text{ }g are put one on the top of the other at the 10.0 cm10.0\text{ }cm mark the scale is found to be balanced at 40.0 cm40.0\text{ }cm mark. The mass of the metre scale is found to be x×10−2x \times10^{- 2} kgkg. The value of xx is

  5. Question 5

    Wave Optics. Asked once: 22 Jan 2025 (same type asked 2 times) See all 2 of this type

    92
    A transparent film of refractive index, 2.0 is coated on a glass slab of refractive index, 1.45. What is the minimum thickness of transparent film to be coated for the maximum transmission of Green light of wavelength 550 nm . [Assume that the light is incident nearly perpendicular to the glass surface.]

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