PYQ Vault

Day 382: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. Asked once: 24 Jan 2023 (same type asked 6 times) See all 6 of this type

    26
    Solid sphere A is rotating about an axis PQ. If the radius of the sphere is 5 cm5\text{ }cm then its radius of gyration about PQ will be x cm\sqrt{x}\text{ }cm. The value of xx is___
  2. Question 2

    Current Electricity. Asked once: 26 Jul 2022 (same type asked 6 times) See all 6 of this type

    26
    Resistance are connected in a meter bridge circuit as shown in the figure. The balancing length l1l_{1} is 40 cm40\text{ }cm. Now an unknown resistance XX is connected in series with PP and new balancing length is found to be 80 cm80\text{ }cm measured from the same end. Then the value of XX will be ____\_\_\_\_ Ω\Omega.
  3. Question 3

    Moving Charges and Magnetism. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    91
    In an ammeter, 5%5\% of the main current passes through the galvanometer. If resistance of the galvanometer is G, the resistance of ammeter will be:

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  4. Question 4

    Moving Charges and Magnetism. Asked once: 2021 Paper 23 (same type asked 6 times) See all 6 of this type

    2
    A current of 1.5 A1.5\text{ }A is flowing through a triangle, of side 9 cm9\text{ }cm each. The magnetic field at the centroid of the triangle is: (Assume that the current is flowing in the clockwise direction.)

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  5. Question 5

    Ray Optics. Asked once: 29 Jun 2022 (same type asked 6 times) See all 6 of this type

    94
    The speed of light in media 'A' and 'B' are 2.0×2.0 \times 1010 cm/s10^{10}\text{ }cm/s and 1.5×1010 cm/s1.5 \times10^{10}\text{ }cm/s respectively. A ray of light enters from the medium BB to AA at an incident angle ' θ\theta '. If the ray suffers total internal reflection, then

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