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Day 406: JEE Mains Physics

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

  1. Question 1

    Dual Nature of Radiation and Matter. Asked once: 26 Jul 2022 (same type asked 6 times) See all 6 of this type

    4
    A parallel beam of light of wavelength 900 nm900\text{ }nm and intensity 100Wm−2100Wm^{- 2} is incident on a surface perpendicular to the beam. The number of photons crossing 1 cm21{\text{ }cm}^{2} area perpendicular to the beam in one second is:

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  2. Question 2

    Moving Charges and Magnetism. Asked once: 26 Jun 2022 (same type asked 6 times) See all 6 of this type

    117
    Two 10 cm10\text{ }cm long, straight wires, each carrying a current of 5 A5\text{ }A are kept parallel to each other. If each wire experienced a force of 10−5 N10^{- 5}\text{ }N, then separation between the wires is ____\_\_\_\_ cmcm.

  3. Question 3

    System of Particles and Rotational Motion. Asked once: 26 Jul 2022 (same type asked 6 times) See all 6 of this type

    112
    The radius of gyration of a cylindrical rod about an axis of rotation perpendicular to its length and passing through the center will be ____\_\_\_\_ m. Given, the length of the rod is 103 m10\sqrt{3}\text{ }m.

  4. Question 4

    Moving Charges and Magnetism. Asked once: 29 Jan 2024 (same type asked 6 times) See all 6 of this type

    12
    A galvanometer having coil resistance 10Ω10\Omega shows a full-scale deflection for a current of 3 mA3\text{ }mA. For it to measure a current of 8 A8\text{ }A, the value of the shunt should be:

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  5. Question 5

    Ray Optics. Asked once: 25 Jun 2022 (same type asked 6 times) See all 6 of this type

    14
    A light wave travelling linearly in a medium of dielectric constant 4 , incident on the horizontal interface separating medium with air. The angle of incidence for which the total intensity of incident wave will be reflected back into the same medium will be (Given : relative permeability of medium μr=1\mu_{r}= 1 )

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