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Day 41: JEE Mains Physics

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

  1. Question 1

    Kinetic Theory. This type asked 4 times: 6 Apr 2023, 5 Apr 2024, 4 Apr 2025, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 4 of this type

    3
    Consider two boxes containing ideal gases A and B such that their temperatures, pressures and number densities are same. The molecular size of A is half of that of B and mass of molecule A is four times that of B. If the collision frequency in gas B is 32×10832 \times 10^{8}/s then collision frequency in gas A is ____\_\_\_\_ /s.

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  2. Question 2

    Gravitation. This type asked 4 times: 2021 Paper 20, 27 Jun 2022, 31 Jan 2024, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 4 of this type

    10
    Net gravitational force at the centre of a square is found to be F1F_{1} when four particles having mass M,2M,3MM,2M,3M and 4M4M are placed at the four corners of the square as shown in figure and it is F2F_{2} when the positions of 3M3M and 4M4M are interchanged. The ratio F1F2\frac{F_{1}}{F_{2}} is α5\frac{\alpha}{\sqrt{5}}. The value of α\alpha is ____\_\_\_\_ .

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  3. Question 3

    Motion in a Plane. This type asked 4 times: 14 Jun 2022, 27 Jun 2022, 11 Apr 2023, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 4 of this type

    7
    A projectile is thrown upward at an angle 60∘60^{\circ} with the horizontal. The speed of the projectile is 20 m/s20\text{ }m/s when its direction of motion is 45∘45^{\circ} with the horizontal. The initial speed of the projectile is ____\_\_\_\_ m/sm/s.

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  4. Question 4

    Thermodynamics. This type asked 4 times: 29 Jul 2022, 23 Jan 2025, 3 Apr 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 4 of this type

    16
    The volume of an ideal gas increases 8 times and temperature becomes (1/4)th (1/4)^{\text{th~}} of initial temperature during a reversible change. If there is no exchange of heat in this process ( ΔQ=0\Delta Q = 0 ) then identify the gas from the following options (Assuming the gases given in the options are ideal gases) :

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  5. Question 5

    Units and Measurements. This type asked 4 times: 5 Apr 2024, 24 Jan 2025, 3 Apr 2025, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 4 of this type

    11
    Keeping the significant figures in view, the sum of the physical quantities 52.01 m,153.2 m52.01\text{ }m,153.2\text{ }m and 0.123 m is :

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