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Day 63: JEE Mains Physics

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

  1. Question 1

    Motion in a Straight Line. This type asked 3 times: 2021 Paper 5, 2021 Paper 10, 24 Jan 2026 S2. This one: 24 Jan 2026 S2 See all 3 of this type

    19
    The velocity (v) - Distance (x) graph is shown in figure. Which graph represents acceleration (a) versus distance (x) variation of this system?

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  2. Question 2

    System of Particles and Rotational Motion. This type asked 3 times: 21 Jan 2026 S2, 22 Jan 2026 S2, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 3 of this type

    16
    Two masses 400 g and 350 g are suspended from the ends of a light string passing over a heavy pulley of radius 2 cm . When released from rest the heavier mass is observed to fall 81 cm in 9 s . The rotational inertia of the pulley is ____\_\_\_\_ kg.m2kg.m^{2}. (g=9.8 m/s2g = 9.8\text{ }m/s^{2})

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  3. Question 3

    Thermodynamics. This type asked 3 times: 24 Jan 2023, 11 Apr 2023, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 3 of this type

    4
    Density of water at 4∘C4^{\circ}C and 20∘C20^{\circ}C are 1000 kg/m31000\text{ }kg/m^{3} and 998 kg/m3998\text{ }kg/m^{3} respectively. The increase in internal energy of 4 kg water when it is heated from 4 ∘C4\ ^{\circ}C to 20∘C20^{\circ}C is ____\_\_\_\_ J. (Specific heat capacity of water =4200 J/kg.K= 4200\text{ }J/kg.K and 1 atmospheric pressure =105 Pa= 10^{5}\text{ }Pa)

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  4. Question 4

    System of Particles and Rotational Motion. This type asked 3 times: 22 Jan 2025, 7 Apr 2025, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 3 of this type

    24
    Suppose there is a uniform circular disc of mass M kg and radius r m shown in figure. The shaded regions are cut out from the disc. The moment of inertia of the remainder about the axis A of the disc is given by X256Mr2\frac{X}{256}{Mr}^{2}. The value of x is ____\_\_\_\_ .

  5. Question 5

    Dual Nature of Radiation and Matter. This type asked 3 times: 2021 Paper 24, 10 Apr 2023, 23 Jan 2026 S1. This one: 23 Jan 2026 S1 See all 3 of this type

    5
    The de Broglie wavelength of an oxygen molecule at 27∘C27^{\circ}C is x×10−12 mx \times 10^{- 12}\text{ }m. The value of x is (take Planck's constant =6.63×10−34 J.s= 6.63 \times 10^{- 34}\text{ }J.s, Boltzmann constant =1.38×10−23 J/K= 1.38 \times 10^{- 23}\text{ }J/K, mass of oxygen molecule =5.31×10−26 kg= 5.31 \times 10^{- 26}\text{ }kg).

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