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Day 162: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Solids. Asked once: 28 Jan 2025 (same type asked 5 times) See all 5 of this type

    98
    The volume contraction of a solid copper cube of edge length 10 cm , when subjected to a hydraulic pressure of 7×106 Pa7 \times10^{6}\text{ }Pa, would be ____\_\_\_\_ mm3mm^{3}. (Given bulk modulus of copper =1.4×1011Nm−2= 1.4 \times10^{11}Nm^{- 2} )

  2. Question 2

    Units and Measurements. Asked once: 11 Apr 2023 (same type asked 5 times) See all 5 of this type

    95
    If force (F)(F), velocity (V)(V) and time (T)(T) are considered as fundamental physical quantity, then dimensional formula of density will be:

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  3. Question 3

    Wave Optics. Asked once: 24 Jan 2025 (same type asked 5 times) See all 5 of this type

    9
    The Young's double slit interference experiment is performed using light consisting of 480 nm and 600 nm wavelengths to form interference patterns. The least number of the bright fringes of 480 nm light that are required for the first coincidence with the bright fringes formed by 600 nm light is :-

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  4. Question 4

    Ray Optics. Asked once: 7 Apr 2025 (same type asked 5 times) See all 5 of this type

    84
    A mirror is used to produce an image with magnification of 14\frac{1}{4}. If the distance between object and its image is 40 cm , then the focal length of the mirror is .

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  5. Question 5

    Waves. Asked once: 22 Jan 2025 (same type asked 5 times) See all 5 of this type

    11
    A closed organ and an open organ tube filled by two different gases having same bulk modulus but different densities ρ1\rho_{1} and ρ2\rho_{2} respectively. The frequency of 9th9^{\text{th}} harmonic of closed tube is identical with 4th 4^{\text{th~}} harmonic of open tube. If the length of the closed tube is 10 cm and the density ratio of the gases is ρ1:ρ2=1:16\rho_{1}:\rho_{2}= 1:16, then the length of the open tube is :

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