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Day 458: JEE Mains Physics

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

  1. Question 1

    Waves. Asked once: 28 Jan 2025

    8
    Given below are two statements: one is labelled as Assertion AA and the other is labelled as Reason RR Assertion A: A sound wave has higher speed in solids than gases. Reason R: Gases have higher value of Bulk modulus than solids. In the light of the above statements, choose the correct answer from the options given below

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  2. Question 2

    Work, Energy and Power. Asked once: 21 Jan 2026 S2

    19
    A body of mass 2 kg is moving along x -direction such that its displacement as function of time is given by x(t)=αt2+βt+γmx(t) = \alpha t^{2}+ \beta t + \gamma m, where α=1 m/s2\alpha = 1\text{ }m/s^{2}, β=1 m/s\beta = 1\text{ }m/s and γ=1 m\gamma = 1\text{ }m. The work done on the body during the time interval t=2 st = 2\text{ }s to t=3 st = 3\text{ }s, is ____\_\_\_\_ J.

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  3. Question 3

    Alternating Current. Asked once: 9 Apr 2024

    18
    A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

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  4. Question 4

    Atoms. Asked once: 3 Apr 2025

    99
    An electron in the hydrogen atom initially in the fourth excited state makes a transition to nth n^{\text{th~}} energy state by emitting a photon of energy 2.86 eV . The integer value of n will be .

  5. Question 5

    Current Electricity. Asked once: 4 Apr 2026 S1

    18
    The voltage and the current between A and B points shown in the circuit are ____\_\_\_\_ .

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