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Day 515: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 6 Apr 2023

    115
    A simple pendulum with length 100 cm100\text{ }cm and bob of mass 250 g250\text{ }g is executing S.H.M. of amplitude 10 cm10\text{ }cm. The maximum tension in the string is found to be x40N\frac{x}{40}N. The value of xx is__

  2. Question 2

    Ray Optics. Asked once: 28 Jan 2025

    5
    A hemispherical vessel is completely - filled with a liquid of refractive index μ\mu. A small coin is kept at the lowest point ( O ) of the vessel as shown in figure. The minimum value of the refractive index of the liquid so that a person can see the coin from point EE (at the level of the vessel) is ____\_\_\_\_

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  3. Question 3

    Semiconductor Electronics. Asked once: 22 Jan 2026 S1

    9
    Find the correct combination of A, B, C and D inputs which can cause the LED to glow.

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  4. Question 4

    System of Particles and Rotational Motion. Asked once: 7 Apr 2025

    6
    A rod of length 5 L is bent right angle keeping one side length as 2 L . The position of the center of mass of the system: (Consider L=10 cmL = 10\text{ }cm )

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  5. Question 5

    Thermal Properties of Matter. Asked once: 2021 Paper 21

    17
    The height of Victoria falls is 63 m63\text{ }m. What is the difference in temperature of water at the top and at the bottom of fall? [Given 1cal=4.2 J1cal = 4.2\text{ }J and specific heat of water =1calg−1 ∘C−1= 1calg^{- 1}\ ^{\circ}C^{- 1}]

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