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Day 301: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Solids. Asked once: 27 Jul 2022 (same type asked 3 times) See all 3 of this type

    111
    In an experiment to determine the Young's modulus, steel wires of five different lengths (1,2,3,4(1,2,3,4 and 5 m)5\text{ }m) but of same cross section (2 mm2)\left( 2{\text{ }mm}^{2} \right) were taken and curves between extension and load were obtained. The slope (extension/load) of the curves were plotted with the wire length and the following graph is obtained. If the Young's modulus of given steel wires is x×1011Nm−2x \times10^{11}Nm^{- 2}, then the value of xx is ____\_\_\_\_.

  2. Question 2

    Ray Optics. Asked once: 29 Jan 2024 (same type asked 3 times) See all 3 of this type

    4
    A convex mirror of radius of curvature 30 cm30\text{ }cm forms an image that is half the size of the object. The object distance is:

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  3. Question 3

    Electrostatics. Asked once: 2021 Paper 21 (same type asked 3 times) See all 3 of this type

    20
    Figure shows a rodABrodAB, which is bent in a 120∘120^{\circ} circular arc of radius R. A charge (−Q)( -Q) is uniformly distributed over rod ABAB. What is the electric field E→\overrightarrow{E} at the centre of curvature OO?

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  4. Question 4

    Kinetic Theory. Asked once: 2021 Paper 25 (same type asked 3 times) See all 3 of this type

    27
    A container is divided into two chambers by a partition. The volume of first chamber is 4.5 litre and second chamber is 5.5 litre. The first chamber contain 3.0 moles of gas at pressure 2.0 atm2.0\text{ }atm and second chamber contain 4.0 moles of gas at pressure 3.0 atm3.0\text{ }atm. After the partition is removed and the mixture attains equilibrium, then, the common equilibrium pressure existing in the mixture is x×10−1 atmx\times10^{- 1}\text{ }atm. Value of xx is

  5. Question 5

    Electromagnetic Waves. Asked once: 31 Jan 2024 (same type asked 3 times) See all 3 of this type

    100
    Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields. Statement II: When electromagnetic waves strike a surface, a pressure is exerted on the surface. In the light of the above statements, choose the most appropriate answer from the options given below:

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