PYQ Vault

Day 478: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 24 Jan 2025

    13
    A particle is executing simple harmonic motion with time period 2 s and amplitude 1 cm . If D and d are the total distance and displacement covered by the particle in 12.5 s , then Dd\frac{D}{d} is :-

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  2. Question 2

    Ray Optics. Asked once: 7 Apr 2025

    89
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : Refractive index of glass is higher than that of air. Reason (R) : Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index. In the light of the above statements, choose the most appropriate answer from the options given below:

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  3. Question 3

    Semiconductor Electronics. Asked once: 2 Apr 2026 S2

    5
    If X and Y are the inputs, the given circuit works as ____\_\_\_\_ .

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  4. Question 4

    System of Particles and Rotational Motion. Asked once: 28 Jan 2026 S1

    4
    Two circular discs of radius each 10 cm are joined at their centres by a rod of length 30 cm and mass 600 gm as shown in figure. If the mass of each disc is 600 gm and applied torque between two discs is 43×10543 \times10^{5} dyne cm , the angular acceleration of the discs about the given axis ABAB is ____\_\_\_\_ rad/s2rad/s^{2}.

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  5. Question 5

    Thermal Properties of Matter. Asked once: 26 Jul 2022

    101
    An ice cube of dimensions 60 cm×50 cm×20 cm60\text{ }cm \times 50\text{ }cm \times 20\text{ }cm is placed in an insulation box of wall thickness 1 cm1\text{ }cm. The box keeping the ice cube at 0∘C0^{\circ}C of temperature is brought to a room of temperature 40∘C40^{\circ}C. The rate of melting of ice is approximately: (Latent heat of fusion of ice is 3.4×105 J kg−13.4 \times10^{5}\text{ }J{\text{ }kg}^{- 1} and thermal conductivity of insulation wall is 0.05 Wm−1 ∘C−10.05\ Wm^{- 1}\ ^{\circ}C^{- 1} )

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