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Day 499: JEE Mains Physics

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

  1. Question 1

    Motion in a Straight Line. Asked once: 4 Apr 2024

    11
    A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time tt. Which of the following curve best describes acceleration of the block with time:

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  2. Question 2

    Moving Charges and Magnetism. Asked once: 15 Apr 2023

    27
    An electron in a hydrogen atom revolves around its nucleus with a speed of 6.76×106 ms−16.76 \times10^{6}{\text{ }ms}^{- 1} in an orbit of radius 0.52 A∘0.52{\text{ }A}^{\circ}. The magnetic field produced at the nucleus of the hydrogen atom is____ T.

  3. Question 3

    Nuclei. Asked once: 8 Apr 2023

    11
    For a nucleus  ZAX\ _{Z}^{A}X having mass number AA and atomic number ZZ (A) The surface energy per nucleon (bs)=a1A2/3\left( b_{s} \right)=a_{1}A^{2/3} (B) The Coulomb contribution to the binding energy bc=−a2Z(Z−1)A4/3b_{c}= -a_{2}\frac{Z(Z - 1)}{A^{4/3}} (C) The volume energy bv=a3Ab_{v}=a_{3}A (D) Decrease in the binding energy is proportional to surface area. (E) While estimating the surface energy, it is assumed that each nucleon interacts with 12 nucleons, (a1,a2\left( a_{1},a_{2} \right. and a3a_{3} are constants) Choose the most appropriate answer from the options given below:

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  4. Question 4

    Oscillations. Asked once: 27 Jan 2024

    98
    A ball suspended by a thread swings in a vertical plane so that its magnitude of acceleration in the extreme position and lowest position are equal. The angle (θ)(\theta) of thread deflection in the extreme position will be :

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  5. Question 5

    Ray Optics. Asked once: 29 Jan 2025

    17
    Let uu and vv be the distances of the object and the image from a lens of focal length ff. The correct graphical representation of uu and vv for a convex lens when ∣u∣>f|u| > f, is

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