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Day 20: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. This type asked 5 times: 2021 Paper 17, 26 Jun 2022, 25 Jul 2022, 31 Jan 2024, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 5 of this type

    25
    A circular loop of radius 20 cm and resistance 2Ω2\Omega is placed in a time varying magnetic field B→=(2t2+2t+3)T\overrightarrow{B} = \left( 2t^{2} + 2t + 3 \right)T. The plane of the loop is perpendicular to the magnetic field. The induced current in the loop at t=3 st = 3\text{ }s is α50 A\frac{\alpha}{50}\text{ }A. The value of α\alpha is ____\_\_\_\_ (Take π=22/7\pi = 22/7 )

  2. Question 2

    Motion in a Straight Line. This type asked 5 times: 24 Jan 2023, 11 Apr 2023, 23 Jan 2025, 28 Jan 2025, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 5 of this type

    4
    The velocity (v)(v) versus time (t)(t) plot of a particle is shown in the figure, for a time interval of 40s. The total distance travelled by the particle and the average velocity during this period are, respectively ____\_\_\_\_

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  3. Question 3

    Nuclei. This type asked 5 times: 1 Feb 2023, 27 Jan 2024, 8 Apr 2024, 2 Apr 2026 S2, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 5 of this type

    19
    Assuming the experimental mass of  612C\ _{6}^{12}C as 12 u , the mass defect of  612C\ _{6}^{12}C atom is ____\_\_\_\_ MeV/c2MeV/c^{2}. (Mass of proton =1.00727u= 1.00727u. mass of neutron =1.00866u,1u=931.5MeV/c2= 1.00866u,1u = 931.5MeV/c^{2} and c is the speed of the light in vacuum.)

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  4. Question 4

    Wave Optics. This type asked 5 times: 27 Jun 2022, 29 Jan 2023, 29 Jan 2024, 24 Jan 2026 S2, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 5 of this type

    17
    The maximum intensity in a Young's double slit experiment is I0I_{0}. Distance between the slits (d) is 5λ5\lambda, where λ\lambda is the wavelength of light used. The intensity of the fringe, exactly opposite to one of the slits on the screen, placed at D=10 dD = 10\text{ }d is ____\_\_\_\_

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  5. Question 5

    Atoms. This type asked 5 times: 2021 Paper 4, 27 Jun 2022, 24 Jan 2023, 6 Apr 2024, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 5 of this type

    11
    In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a lower orbit (f). The ratio of the radius of the orbits is given by ri:rf=16:4r_{i}:r_{f}= 16:4. The wavelength of photon emitted due to this transition is ____\_\_\_\_ nm. (Given Rydberg constant =1.0973×107/m= 1.0973 \times10^{7}/m )

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