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Day 159: JEE Mains Physics

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

  1. Question 1

    Dual Nature of Radiation and Matter. Asked once: 8 Apr 2023 (same type asked 6 times) See all 6 of this type

    20
    Proton (P) and electron (e) will have same deBroglie wavelength when the ratio of their momentum is (assume, mp=1849 mem_{p}= 1849{\text{ }m}_{e} )

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  2. Question 2

    Oscillations. Asked once: 30 Jan 2024 (same type asked 6 times) See all 6 of this type

    118
    A simple pendulum is placed at a place where its distance from the earth's surface is equal to the radius of the earth. If the length of the string is 4 m4\text{ }m, then the time period of small oscillations will be _____ s. (take g=π2 ms−2g = \pi^{2}{\text{ }ms}^{- 2})

  3. Question 3

    Thermodynamics. Asked once: 25 Jan 2023 (same type asked 6 times) See all 6 of this type

    19
    A Carnot engine with efficiency 50%50\% takes heat from a source at 600 K600\text{ }K. In order to increase the efficiency to 70%70\%, keeping the temperature of sink same, the new temperature of the source will be:

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  4. Question 4

    Motion in a Straight Line. Asked once: 5 Apr 2024 (same type asked 5 times) See all 5 of this type

    26
    A body moves on a frictionless plane starting from rest. If SnS_{n} is distance moved between t=n−1t = n - 1 and tt =n= n and Sn−1S_{n - 1} is distance moved between t=n−2t = n - 2 and t=n−1t = n - 1, then the ratio Sn−1Sn\frac{S_{n - 1}}{S_{n}} is (1−2x)\left( 1 -\frac{2}{x} \right) for nn =10= 10. The value of xx is ______

  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 15 Apr 2023 (same type asked 5 times) See all 5 of this type

    6
    The de Broglie wavelength of an electron having kinetic energy EE is λ\lambda. If the kinetic energy of electron becomes E4\frac{E}{4}, then its de-Broglie wavelength will be:

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