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Day 240: JEE Mains Physics

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

  1. Question 1

    Laws of Motion. Asked once: 25 Jan 2023 (same type asked 2 times) See all 2 of this type

    100
    Consider a block kept on an inclined plane (inclined at 45∘45^{\circ} ) as shown in the figure. If the force required to just push it up the incline is 2 times the force required to just prevent it from sliding down, the coefficient of friction between the block and inclined plane (μ)(\mu) is equal to:

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  2. Question 2

    Motion in a Plane. Asked once: 25 Jun 2022 (same type asked 2 times) See all 2 of this type

    93
    A disc with a flat small bottom beaker placed on it at a distance RR from its center is revolving about an axis passing through the center and perpendicular to its plane with an angular velocity ω\omega. The coefficient of static friction between the bottom of the beaker and the surface of the disc is μ\mu. The beaker will revolve with the disc if:

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  3. Question 3

    Work, Energy and Power. Asked once: 2021 Paper 13 (same type asked 2 times) See all 2 of this type

    20
    A bullet of mass 4gm4gm is shot from a gun of mass 4 kg4\text{ }kg. Bullet has speed 50 ms−150{\text{ }ms}^{- 1}. Find the impulse of bullet and velocity of recoil of gun?

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  4. Question 4

    Electrostatics. Asked once: 15 Apr 2023 (same type asked 2 times) See all 2 of this type

    1
    The electric field due to a short electric dipole at a large distance (r) from center of dipole on the equatorial plane varies with distance as:

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  5. Question 5

    Ray Optics. Asked once: 28 Jul 2022 (same type asked 2 times) See all 2 of this type

    119
    In an experiment with a convex lens. The plot of the image distance (v') against the object distance (u′)(u') measured from the focus gives a curve v′u′=225v'u' = 225. If all the distances are measured in cmcm. The magnitude of the focal length of the lens is ____\_\_\_\_ cmcm.