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Day 359: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Waves. Asked once: 25 Jun 2022 (same type asked 4 times) See all 4 of this type

    12
    The electric field in an electromagnetic wave is given by E=56.5sin⁡ω(t−x/c)NC−1E = 56.5\sin\omega(t - x/c)NC^{- 1}. Find the intensity of the wave if it is propagating along xx-axis in the free space. (Given ε0=8.85×10−12C2 N−1 m−2\varepsilon_{0}= 8.85 \times10^{- 12}C^{2}{\text{ }N}^{- 1}{\text{ }m}^{- 2} )

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  2. Question 2

    Magnetism and Matter. Asked once: 2021 Paper 2 (same type asked 4 times) See all 4 of this type

    18
    A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:

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  3. Question 3

    Oscillations. Asked once: 2021 Paper 3 (same type asked 4 times) See all 4 of this type

    15
    If the time period of a two meter long simple pendulum is 2 s2\text{ }s, the acceleration due to gravity at the place where pendulum is executing S.H.M. is:

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  4. Question 4

    Ray Optics. Asked once: 27 Jul 2022 (same type asked 4 times) See all 4 of this type

    113
    A thin prism of angle 6∘6^{\circ} and refractive index for yellow light (nY)1.5\left( n_{Y} \right)1.5 is combined with another prism of angle 5∘5^{\circ} and nY=1.55n_{Y}= 1.55. The combination produces no dispersion. The net average deviation ( δ)\delta) produced by the combination is (1x)∘\left( \frac{1}{x} \right)^{\circ}. The value of xx is ____\_\_\_\_.

  5. Question 5

    Kinetic Theory. Asked once: 6 Apr 2023 (same type asked 4 times) See all 4 of this type

    4
    The number of air molecules per cm3cm^{3} increased from 3×10193 \times10^{19} to 12×101912 \times10^{19}. The ratio of collision frequency of air molecules before and after the increase in number respectively is

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