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Day 179: JEE Mains Physics

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

  1. Question 1

    Waves. Asked once: 4 Apr 2025 (same type asked 4 times) See all 4 of this type

    7
    Consider the sound wave travelling in ideal gases of He,CH4He,CH_{4}, and CO2CO_{2}. All the gases have the same ratio Pρ\frac{P}{\rho}, where PP is the pressure and ρ\rho is the density. The ratio of the speed of sound through the gases vHe:vCH4:vCO2v_{He}:v_{CH_{4}}:v_{CO_{2}} is given by.

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  2. Question 2

    Electromagnetic Waves. Asked once: 6 Apr 2024 (same type asked 4 times) See all 4 of this type

    94
    In the given electromagnetic wave Ey=600sin⁡(ωt−kx)Vm−1E_{y}= 600\sin(\omega t - kx)Vm^{- 1}, intensity of the associated light beam is (in W/m2W/m^{2} ); (Given ϵ0=\epsilon_{0}= 9×10−12C2 N−1 m−29 \times10^{- 12}C^{2}{\text{ }N}^{- 1}{\text{ }m}^{- 2} )

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  3. Question 3

    Magnetism and Matter. Asked once: 2021 Paper 13 (same type asked 4 times) See all 4 of this type

    10
    Identify the correct statement/statements Statement -1: Ferromagnetic converts to Paramagnetic on Heating. Statement-2: Domains of Ferromagnetic material increase on Heating.

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  4. Question 4

    Oscillations. Asked once: 29 Jun 2022 (same type asked 4 times) See all 4 of this type

    102
    The motion of a simple pendulum excuting S.H.M. is represented by following equation. Y=Asin(πt+ϕ)Y = Asin(\pi t + \phi), where time is measured in second. The length of pendulum is:

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  5. Question 5

    Ray Optics. Asked once: 28 Jan 2025 (same type asked 4 times) See all 4 of this type

    20
    A thin prism P1P_{1} with angle 4∘4^{\circ} made of glass having refractive index 1.54 , is combined with another thin prism P2P_{2} made of glass having refractive index 1.72 to get dispersion without deviation. The angle of the prism P2P_{2} in degrees is

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