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Day 12: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Fluids. This type asked 6 times: 26 Jun 2022, 28 Jun 2022, 12 Apr 2023, 13 Apr 2023, 21 Jan 2026 S1, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 6 of this type

    8
    A liquid of density 600 kg/m3600\text{ }kg/m^{3} flowing steadily in a tube of varying cross-section. The cross-section at a point A is 1.0 cm21.0{\text{ }cm}^{2} and that at B is 20 mm220{\text{ }mm}^{2}. Both the points A and B are in same horizontal plane, the speed of the liquid at A is 10 cm/s10\text{ }cm/s. The difference is pressures at A and B points is____\_\_\_\_ Pa.

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  2. Question 2

    Moving Charges and Magnetism. This type asked 6 times: 29 Jun 2022, 25 Jan 2023, 27 Jan 2024, 4 Apr 2024, 22 Jan 2025, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 6 of this type

    13
    A current of 30 A each flows in opposite directions in two conducting wires, placed parallel to each other at a distance of 8 cm . The magnetic field at the midpoint between the two wires is ____\_\_\_\_ μT\mu T. ( μ04π=10−7 N/A2\frac{\mu_{0}}{4\pi}=10^{- 7}\text{ }N/A^{2} )

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  3. Question 3

    Units and Measurements. This type asked 6 times: 2021 Paper 15, 31 Jan 2024, 23 Jan 2025, 29 Jan 2025, 21 Jan 2026 S1, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 6 of this type

    2
    The potential energy of a particle changes with distance xx from a fixed origin as V=Axx+BV=\frac{A\sqrt{x}}{x+B}, where A and B are constant with appropriate dimensions. The dimension of AB are ____\_\_\_\_ .

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  4. Question 4

    Mechanical Properties of Solids. This type asked 6 times: 2021 Paper 16, 26 Jun 2022, 8 Apr 2023, 13 Apr 2023, 2 Apr 2025, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 6 of this type

    21
    A copper wire of length 3 m is stretched by 3 mm by applying an external force. The volume of the wire is 600×10−6 m3600 \times 10^{- 6}{\text{ }m}^{3}. The elastic potential energy stored in the wire in stretched condition would be ____\_\_\_\_ J. (Given Young modulus of copper  =1.1×1011 N/m2)\left. \ = 1.1 \times 10^{11}\text{ }N/m^{2} \right)

  5. Question 5

    Gravitation. This type asked 6 times: 2021 Paper 23, 2021 Paper 26, 29 Jul 2022, 31 Jan 2023, 29 Jan 2024, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 6 of this type

    3
    When one moves from a point 16 km below the earth's surface to a point 16 km above the earth's surface. The change in g is approximately α%\alpha\%. The value of α\alpha is ____\_\_\_\_ . (Take radius of the earth =6400 km= 6400\text{ }km.)

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