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Day 413: JEE Mains Physics

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

  1. Question 1

    Electrostatics. Asked once: 25 Jan 2023 (same type asked 9 times) See all 9 of this type

    119
    A capacitor has capacitance 5μF5\mu F when its parallel plates are separated by air medium of thickness dd. A slab of material of dielectric constant 1.5 having area equal to that of plates but thickness d2\frac{d}{2} is inserted between the plates. Capacitance of the capacitor in the presence of slab will be ___ μF\mu F.

  2. Question 2

    Kinetic Theory. Asked once: 2021 Paper 21 (same type asked 9 times) See all 9 of this type

    9
    If the rms speed of oxygen molecules at 0∘C0^{\circ}C is 160 m/s160\text{ }m/s, find the rms speed of hydrogen molecules at 0∘C0^{\circ}C.

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  3. Question 3

    Current Electricity. Asked once: 26 Jun 2022 (same type asked 9 times) See all 9 of this type

    13
    An aluminium wire is stretched to make its length, 0.4%0.4\% larger. Then percentage change in resistance is:

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  4. Question 4

    Wave Optics. Asked once: 10 Apr 2023 (same type asked 8 times) See all 8 of this type

    102
    The ratio of intensities at two points PP and QQ on the screen in a Young's double slit experiment where phase difference between two wave of same amplitude are π/3\pi/3 and π/2\pi/2, respectively are

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  5. Question 5

    Ray Optics. Asked once: 31 Jan 2024 (same type asked 8 times) See all 8 of this type

    112
    Light from a point source in air falls on a convex curved surface of radius 20 cm20\text{ }cm and refractive index 1.5. If the source is located at 100 cm100\text{ }cm from the convex surface, the image will be formed at ______ cmcm from the object.