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Day 286: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Fluids. Asked once: 28 Jan 2025 (same type asked 4 times) See all 4 of this type

    93
    a 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water? (Given : density of water =1000 kg m−3= 1000\text{ }kg{\text{ }m}^{- 3} )

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  2. Question 2

    Units and Measurements. Asked once: 26 Jul 2022 (same type asked 4 times) See all 4 of this type

    23
    In an experiment to determine the Young's modulus of wire of a length exactly 1 m1\text{ }m, the extension in the length of the wire is measured as 0.4 mm0.4\text{ }mm with an uncertainty of ±0.02 mm\pm 0.02\text{ }mm when a load of 1 kg1\text{ }kg is applied. The diameter of the wire is measured as 0.4 mm0.4\text{ }mm with an uncertainty of ±0.01 mm\pm 0.01\text{ }mm. The error in the measurement of Young's modulus (ΔY)(\Delta Y) is found to be x×1010Nm−2x \times10^{10}Nm^{- 2}. The value of xx is [Take g=10 m/s2g = 10\text{ }m/s^{2} ]

  3. Question 3

    Kinetic Theory. Asked once: 13 Apr 2023 (same type asked 4 times) See all 4 of this type

    110
    The mean free path of molecules of a certain gas at STP is 1500d1500d, where dd is the diameter of the gas molecules. While maintaining the standard pressure, the mean free path of the molecules at 373 K373\text{ }K is approximately:

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  4. Question 4

    Thermodynamics. Asked once: 5 Apr 2024 (same type asked 4 times) See all 4 of this type

    18
    The heat absorbed by a system in going through the given cyclic process is:

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  5. Question 5

    Current Electricity. Asked once: 29 Jan 2023 (same type asked 4 times) See all 4 of this type

    118
    A null point is found at 200 cm200\text{ }cm in potentiometer when cell in secondary circuit is shunted by 5Ω5\Omega. When a resistance of 15Ω15\Omega is used for shunting, null point moves to 300 cm300\text{ }cm. The internal resistance of the cell is_____ Ω\Omega.