PYQ Vault

Day 271: JEE Mains Physics

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

  1. Question 1

    Atoms. Asked once: 24 Jan 2023 (same type asked 5 times) See all 5 of this type

    97
    A photon is emitted in transition from n=4n = 4 to n=1n = 1 level in hydrogen atom. The corresponding wavelength for this transition is (given, h=4×10−15eVsh = 4 \times10^{- 15}eVs ):

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  2. Question 2

    Dual Nature of Radiation and Matter. Asked once: 9 Apr 2024 (same type asked 5 times) See all 5 of this type

    105
    UV light of 4.13eV4.13eV is incident on a photosensitive metal surface having work function 3.13eV3.13eV. The maximum kinetic energy of ejected photoelectrons will be:

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  3. Question 3

    Electromagnetic Waves. Asked once: 22 Jan 2025 (same type asked 5 times) See all 5 of this type

    98
    A parallel plate capacitor of area A=16 cm2A = 16{\text{ }cm}^{2} and separation between the plates 10 cm , is charged by a DC current. Consider a hypothetical plane surface of area A0=3.2 cm2A_{0}= 3.2{\text{ }cm}^{2} inside the capacitor and parallel to the plates. At an instant, the current through the circuit is 6 A . At the same instant the displacement current through A0A_{0} is ______\_\_\_\_\_\_ mA .
  4. Question 4

    Wave Optics. Asked once: 22 Jan 2025 (same type asked 5 times) See all 5 of this type

    4
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : If Young's double slit experiment is performed in an optically denser medium than air, then the consecutive fringes come closer. Reason (R) : The speed of light reduces in an optically denser medium than air while its frequency does not change. In the light of the above statements, choose the most appropriate answer from the options given below :

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  5. Question 5

    Mechanical Properties of Solids. Asked once: 24 Jan 2025 (same type asked 5 times) See all 5 of this type

    99
    The increase in pressure required to decrease the volume of a water sample by 0.2%0.2\% is P×105Nm−2P \times10^{5}Nm^{- 2}. Bulk modulus of water is 2.15×109Nm−22.15 \times10^{9}Nm^{- 2}. The value of PP is _____\_\_\_\_\_