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Day 35: JEE Mains Physics

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

  1. Question 1

    Current Electricity. This type asked 4 times: 2021 Paper 13, 14 Jun 2022, 11 Apr 2023, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 4 of this type

    24
    When an external resistance of 5Ω5\Omega is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5Ω5\Omega resistor is replaced by a 2Ω2\Omega resistor, a current of 0.5 A flows through it. The internal resistance of the cell is ____\_\_\_\_ Ω\Omega.

  2. Question 2

    Ray Optics. This type asked 4 times: 10 Apr 2023, 12 Apr 2023, 8 Apr 2024, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 4 of this type

    16
    An object AB is placed 15 cm on the left of a convex lens P of focal length 10 cm . Another convex lens Q is now placed 15 cm right of lens P . If the focal length of lens Q is 15 cm , the final image is ____\_\_\_\_

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  3. Question 3

    System of Particles and Rotational Motion. This type asked 4 times: 2021 Paper 4, 8 Apr 2023, 1 Feb 2024, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 4 of this type

    6
    An object of uniform density rolls up the curved path with the initial velocity v0v_{0} as shown in the figure. If the maximum height attained by an object is 7v0210 g\frac{7v_{0}^{2}}{10\text{ }g} (g=g = acceleration due to gravity), the object is a ____\_\_\_\_ .

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  4. Question 4

    Dual Nature of Radiation and Matter. This type asked 4 times: 27 Jul 2022, 24 Jan 2025, 2 Apr 2025, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 4 of this type

    10
    An electron of mass mm is moving in an electric field E→=−2E0i^\overrightarrow{E} = -2E_{0}\widehat{i} (E0E_{0} = constant >0> 0), with an initial velocity V→=v0i^\overrightarrow{V} = v_{0}\widehat{i} (v0v_{0} = constant >0> 0). If λ0=h4mv0\lambda_{0}=\frac{h}{4mv_{0}}, its de Broglie wavelength at time t is ____\_\_\_\_ . ( e=e = charge of electron)

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  5. Question 5

    Mechanical Properties of Fluids. This type asked 4 times: 1 Feb 2023, 10 Apr 2023, 22 Jan 2025, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 4 of this type

    7
    A water spray gun is attached to a hose of cross-sectional area 30 cm230{\text{ }cm}^{2}. The gun comprises of 10 perforations each of cross-sectional area of 15 mm215{\text{ }mm}^{2}. If the water flows in the hose with the speed of 50 cm/s50\text{ }cm/s, calculate the speed at which the water flows out from each perforation. (Neglect any edge effects)

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