PYQ Vault

Day 54: JEE Mains Physics

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

  1. Question 1

    Dual Nature of Radiation and Matter. Asked 3 times: 11 Apr 2023*, 31 Jan 2024*, 2 Apr 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked

    17
    For a certain metal, when monochromatic light of wavelength λ\lambda is incident, the stopping potential for photoelectrons is 3V03V_{0}. When the same metal is illuminated by light of wavelength 2λ2\lambda, then the stopping potential becomes V0V_{0}. The threshold wavelength for photoelectric emission for the given metal is αλ\alpha\lambda. The value of α\alpha is ____\_\_\_\_ .

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  2. Question 2

    Alternating Current. Asked 3 times: 2021 Paper 20*, 4 Apr 2024*, 7 Apr 2025 (* = numbers or wording changed that year) See all 3 times it was asked

    9
    An ac current is represented asi=52+10cos⁡(650πt+π6) Amp i= 5\sqrt{2}+ 10\cos\left( 650\pi t+\frac{\pi}{6} \right)\text{~Amp~}The r.m.s value of the current is.

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  3. Question 3

    Alternating Current. Asked 3 times: 2021 Paper 7, 2021 Paper 25, 24 Jan 2025 See all 3 times it was asked

    16
    An alternating current is given by I=IAsin⁡ωt+IBcos⁡ωtI =I_{A}\sin\omega t +I_{B}\cos\omega t. The r.m.s. current will be :-

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  4. Question 4

    Moving Charges and Magnetism. Asked 3 times: 25 Jun 2022, 6 Apr 2023, 24 Jan 2025 See all 3 times it was asked

    80
    A long straight wire of a circular cross-section with radius ' aa ' carries a steady current II. The current II is a uniformly distributed across this cross-section The plot of magnitude of magnetic field BB with distance rr from the centre of the wire is given by

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  5. Question 5

    Thermodynamics. Asked 3 times: 1 Feb 2023, 4 Apr 2024, 9 Apr 2024 See all 3 times it was asked

    20
    A sample of 1 mole gas at temperature TT is adiabatically expanded to double its volume. If adiabatic constant for the gas is γ=32\gamma=\frac{3}{2}, then the work done by the gas in the process is:

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