PYQ Vault

Day 456: JEE Mains Physics

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

  1. Question 1

    Moving Charges and Magnetism. Asked once: 24 Jan 2025

    86
    N equally spaced charges each of value q , are placed on a circle of radius RR. The circle rotates about its axis with an angular velocity ω\omega as shown in the figure. A bigger Amperian loop BB encloses the whole circle where as a smaller Amperian loop A encloses a small segment. The difference between enclosed currents, IA−IBI_{A}-I_{B}, for the given Amperian loops is

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  2. Question 2

    Nuclei. Asked once: 22 Jan 2026 S1

    11
    The minimum frequency of photon required to break a particle of mass 15.348 amu into 4α4\alpha particles is ____\_\_\_\_ kHz . [mass of He nucleus = 4.002 amu ,1amu=1.66×10−27 kg, h=6.6×10−34 J.s1amu = 1.66 \times10^{- 27}\text{ }kg,\text{ }h = 6.6 \times10^{- 34}\text{ }J.s and c=3×108 m/sc = 3 \times10^{8}\text{ }m/s ]

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  3. Question 3

    Oscillations. Asked once: 4 Apr 2025

    17
    Two simple pendulums having lengths l1l_{1} and l2l_{2} with negligible string mass undergo angular displacements θ1\theta_{1} and θ2\theta_{2}, from their mean positions, respectively. If the angular accelerations of both pendulums are same, then which expression is correct ?

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  4. Question 4

    Ray Optics. Asked once: 23 Jan 2026 S2

    22
    The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions 8 cm and 24 cm from the lens. The focal length of the lens is ____\_\_\_\_ cm .
  5. Question 5

    Semiconductor Electronics. Asked once: 5 Apr 2026 S1

    20
    For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?

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