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Day 282: JEE Mains Physics

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

  1. Question 1

    Waves. Asked once: 25 Jul 2022 (same type asked 5 times) See all 5 of this type

    117
    Two waves executing simple harmonic motion travelling in the same direction with same amplitude and frequency are superimposed. The resultant amplitude is equal to the 3\sqrt{3} times of amplitude of individual motions. The phase difference between the two motions is ____\_\_\_\_ degree.

  2. Question 2

    Ray Optics. Asked once: 23 Jan 2025 (same type asked 4 times) See all 4 of this type

    17
    Given a thin convex lens (refractive index μ2\mu_{2} ), kept in a liquid (refractive index μ1,μ1<μ2\mu_{1},\mu_{1}<\mu_{2} ) having radii of curvature ∣R1∣\left| R_{1} \right| and ∣R2∣\left| R_{2} \right|. Its second surface is silver polished. Where should an object be placed on the optic axis so that a real and inverted image is formed at the same place?

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  3. Question 3

    Units and Measurements. Asked once: 15 Apr 2023 (same type asked 4 times) See all 4 of this type

    17
    The speed of a wave produced in water is given by v=λagbρcv =\lambda^{a}g^{b}\rho^{c}. Where λ,g\lambda,g and ρ\rho are wavelength of wave, acceleration due to gravity and density of water respectively. The values of a,ba,b and cc respectively, are:

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  4. Question 4

    Current Electricity. Asked once: 30 Jan 2024 (same type asked 4 times) See all 4 of this type

    22
    Two cells are connected in opposition as shown. Cell E1E_{1} is of 8 V8\text{ }V emf and 2Ω2\Omega internal resistance; the cell E2E_{2} is of 2 V2\text{ }V emf and 4Ω4\Omega internal resistance. The terminal potential difference of cell E2E_{2} is ____\_\_\_\_ V.

  5. Question 5

    Work, Energy and Power. Asked once: 25 Jul 2022 (same type asked 4 times) See all 4 of this type

    4
    A body of mass 0.5 kg0.5\text{ }kg travels on straight line path with velocity v=(3x2+4)m/sv =\left( 3x^{2}+ 4 \right)m/s. The net work done by the force during its displacement from x=0x = 0 to x=2 mx = 2\text{ }m is:

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