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Day 474: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 29 Jan 2023

    17
    Which of the following are true? A. Speed of light in vacuum is dependent on the direction of propagation. B. Speed of light in a medium is independent of the wavelength of light. C. The speed of light is independent of the motion of the source. D. The speed of light in a medium is independent of intensity. Choose the correct answer from the options given below:

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  2. Question 2

    Waves. Asked once: 12 Apr 2023

    21
    For a certain organ pipe, the first three resonance frequencies are in the ratio of 1:3:5 respectively. If the frequency of fifth harmonic is 405 Hz405\text{ }Hz and the speed of sound in air is 324 ms−1324{\text{ }ms}^{- 1} the length of the organ pipe is____ m.

  3. Question 3

    Work, Energy and Power. Asked once: 3 Apr 2025

    85
    Consider two blocks A and B of masses m1=10 kgm_{1}= 10\text{ }kg and m2=5 kgm_{2}= 5\text{ }kg that are placed on a frictionless table. The block A moves with a constant speed v=3 m/sv= 3\text{ }m/s towards the block B kept at rest. A spring with spring constant k=3000 N/mk = 3000\text{ }N/m is attached with the block B as shown in the figure. After the collision, suppose that the blocks A and B, along with the spring in constant compression state, move together, then the compression in the spring is, (Neglect the mass of the spring)

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  4. Question 4

    Alternating Current. Asked once: 4 Apr 2024

    99
    Match List I with List II Choose the correct answer from the options given below:

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  5. Question 5

    Atoms. Asked once: 6 Apr 2024

    27
    Radius of a certain orbit of hydrogen atom is 8.48Å8.48\text{Å}. If energy of electron in this orbit is E/xE/x, then x=x = _______ . (Given a0=0.529Å,E=a_{0}= 0.529\text{Å},E = energy of electron in ground state)