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Day 11: JEE Mains Physics

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

  1. Question 1

    Current Electricity. This type asked 7 times: 2021 Paper 17, 28 Jun 2022, 12 Apr 2023, 30 Jan 2024, 4 Apr 2024, 8 Apr 2024, 9 Apr 2024. This one: 9 Apr 2024 See all 7 of this type

    120
    At room temperature (27∘C)\left( 27^{\circ}C \right), the resistance of a heating element is 50Ω50\Omega. The temperature coefficient of the material is 2.4×10−4 ∘C−12.4 \times10^{- 4}\ ^{\circ}C^{- 1}. The temperature of the element, when its resistance is 62Ω62\Omega, is _______  ∘C\ ^{\circ}C.

  2. Question 2

    Units and Measurements. This type asked 7 times: 2021 Paper 1, 2021 Paper 11, 2021 Paper 25, 26 Jun 2022, 27 Jul 2022, 28 Jul 2022, 4 Apr 2024. This one: 4 Apr 2024 See all 7 of this type

    13
    The equation of stationary wave is:
    y=2asin⁡(2πntλ)cos⁡(2πxλ)y = 2a\sin\left( \frac{2\pi nt}{\lambda} \right)\cos\left( \frac{2\pi x}{\lambda} \right)
    Which of the following is NOT correct?

    Tap an option to check your answer.

  3. Question 3

    Oscillations. This type asked 7 times: 2021 Paper 7, 2021 Paper 16, 31 Jan 2023, 1 Feb 2023, 12 Apr 2023, 13 Apr 2023, 29 Jan 2024. This one: 29 Jan 2024 See all 7 of this type

    28
    When the displacement of a simple harmonic oscillator is one third of its amplitude, the ratio of total energy to the kinetic energy is x8\frac{x}{8}, where x=x = _______

  4. Question 4

    Nuclei. This type asked 7 times: 2021 Paper 20, 29 Jun 2022, 27 Jul 2022, 28 Jul 2022, 29 Jan 2023, 10 Apr 2023, 15 Apr 2023. This one: 15 Apr 2023 See all 7 of this type

    5
    The half-life of a radioactive nucleus is 5 years, the fraction of the original sample that would decay in 15 years is:

    Tap an option to check your answer.

  5. Question 5

    Thermodynamics. This type asked 7 times: 2021 Paper 7, 2021 Paper 21, 14 Jun 2022, 26 Jun 2022, 27 Jun 2022, 29 Jun 2022, 8 Apr 2023. This one: 8 Apr 2023 See all 7 of this type

    102
    Work done by a Carnot engine operating between temperatures 127∘C127^{\circ}C and 27∘C27^{\circ}C is 2 kJ2\text{ }kJ. The amount of heat transferred to the engine by the reservoir is:

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