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Day 263: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Fluids. Asked once: 13 Apr 2023 (same type asked 6 times) See all 6 of this type

    16
    The figure shows a liquid of given density flowing steadily in horizontal tube of varying cross-section. Cross sectional areas at A is 1.5 cm21.5{\text{ }cm}^{2}, and BB is 25 mm225{\text{ }mm}^{2}, if the speed of liquid at BB is 60 cm/s60\text{ }cm/s then (PA−PB)\left( P_{A}-P_{B} \right) is : (Given PAP_{A} and PBP_{B} are liquid pressures at AA and BB points. Density ρ=1000 kg m−3\rho = 1000\text{ }kg{\text{ }m}^{- 3} AA and BB are on the axis of tube

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  2. Question 2

    Moving Charges and Magnetism. Asked once: 4 Apr 2024 (same type asked 6 times) See all 6 of this type

    119
    Two parallel long current carrying wire separated by a distance 2r2r are shown in the figure. The ratio of magnetic field at AA to the magnetic field produced at CC is x7\frac{x}{7}. The value of xx is _____ .

  3. Question 3

    Units and Measurements. Asked once: 29 Jan 2025 (same type asked 6 times) See all 6 of this type

    6
    The expression given below shows the variation of velocity (v) with time ( t ), v=At2+BtC+tv =At^{2}+\frac{Bt}{C + t}. The dimension of ABC is :

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  4. Question 4

    Mechanical Properties of Solids. Asked once: 13 Apr 2023 (same type asked 6 times) See all 6 of this type

    21
    The elastic potential energy stored in a steel wire of length 20 m20\text{ }m stretched through 2 cm2\text{ }cm is 80 J80\text{ }J. The cross-sectional area of the wire is ___ mm2mm^{2}. (Given, y=2.0×1011Nm−2y = 2.0 \times10^{11}Nm^{- 2} )

  5. Question 5

    Gravitation. Asked once: 31 Jan 2023 (same type asked 6 times) See all 6 of this type

    19
    At a certain depth "d " below surface of earth, value of acceleration due to gravity becomes four times that of its value at a height 3R3R above earth surface. Where RR is Radius of earth (Take R=6400 kmR = 6400\text{ }km ). The depth dd is equal to

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