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Day 17: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. This type asked 6 times: 26 Jun 2022, 24 Jan 2023, 15 Apr 2023, 30 Jan 2024, 4 Apr 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 6 of this type

    76
    A uniform magnetic field of 0.4 T acts perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform angular velocity of 10πrads−110\pi rads^{- 1} about an axis through its centre and perpendicular to the disc. What is the potential difference developed between the axis of the disc and the rim ? (π=3.14)(\pi= 3.14)

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  2. Question 2

    Kinetic Theory. This type asked 6 times: 2021 Paper 13, 2021 Paper 24, 1 Feb 2023, 27 Jan 2024, 31 Jan 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 6 of this type

    80
    The kinetic energy of translation of the molecules in 50 g of CO2CO_{2} gas at 17∘C17^{\circ}C is :

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  3. Question 3

    Wave Optics. This type asked 6 times: 2021 Paper 9, 2021 Paper 23, 2021 Paper 25, 25 Jan 2023, 5 Apr 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 6 of this type

    25
    A double slit interference experiment performed with a light of wavelength 600 nm forms an interference fringe pattern on a screen with 10th 10^{\text{th~}} bright fringe having its centre at a distance of 10 mm from the central maximum. Distance of the centre of the same 10th 10^{\text{th~}} bright fringe from the central maximum when the source of light is replaced by another source of wavelength 660 nm would be _____\_\_\_\_\_ mm .

  4. Question 4

    System of Particles and Rotational Motion. This type asked 6 times: 26 Jun 2022, 29 Jan 2023, 31 Jan 2023, 12 Apr 2023, 5 Apr 2024, 24 Jan 2025. This one: 24 Jan 2025 See all 6 of this type

    79
    A solid sphere is rolling without slipping on a horizontal plane. The ratio of the linear kinetic energy of the centre of mass of the sphere and rotational kinetic energy is :

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  5. Question 5

    Work, Energy and Power. This type asked 6 times: 2021 Paper 15, 1 Feb 2023, 11 Apr 2023, 15 Apr 2023, 9 Apr 2024, 24 Jan 2025. This one: 24 Jan 2025 See all 6 of this type

    19
    A force F=α+βx2F = \alpha + \beta x^{2} acts on an object in the x -direction. The work done by the force is 5 J when the object is displaced by 1 m . If the constant, α=1 N\alpha = 1\text{ }N then β\beta will be

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