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Day 288: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 31 Jan 2024 (same type asked 4 times) See all 4 of this type

    96
    When unpolarized light is incident at an angle of 60∘60^{\circ} on a transparent medium from air. The reflected ray is completely polarized. The angle of refraction in the medium is

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  2. Question 2

    Mechanical Properties of Fluids. Asked once: 28 Jun 2022 (same type asked 4 times) See all 4 of this type

    97
    A water drop of radius 1μm1\mu m falls in a situation where the effect of buoyant force is negligible. Coefficient of viscosity of air is 1.8×10−5Nsm−21.8 \times10^{- 5}Nsm^{- 2} and its density is negligible as compared to that of water 106gm−310^{6}gm^{- 3}. Terminal velocity of the water drop is: (Take acceleration due to gravity =10 ms−2= 10{\text{ }ms}^{- 2} )

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  3. Question 3

    Waves. Asked once: 31 Jan 2024 (same type asked 4 times) See all 4 of this type

    97
    The speed of sound in oxygen at S.T.P. will be approximately: (Given, R=8.3 JK−1mol−1,γ=1.4R = 8.3\text{ }JK^{- 1}mol^{- 1},\gamma = 1.4 )

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  4. Question 4

    Electromagnetic Waves. Asked once: 27 Jan 2024 (same type asked 4 times) See all 4 of this type

    16
    A plane electromagnetic wave propagating in xx-direction is described by Ey=(200Vm−1)sin⁡[1.5×107t−0.05x]E_{y}=\left( 200Vm^{- 1} \right)\sin\left\lbrack 1.5 \times10^{7}t - 0.05x \right\rbrack; The intensity of the wave is: (Use ∈0=8.85×10−12C2 N−1 m−2\in_{0}= 8.85 \times10^{- 12}C^{2}{\text{ }N}^{- 1}{\text{ }m}^{- 2} )

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  5. Question 5

    Magnetism and Matter. Asked once: 2021 Paper 4 (same type asked 4 times) See all 4 of this type

    5
    In a ferromagnetic material, below the Curie temperature, a domain is defined as:

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