PYQ Vault

Day 307: JEE Mains Physics

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

  1. Question 1

    Work, Energy and Power. Asked once: 28 Jan 2025 (same type asked 3 times) See all 3 of this type

    11
    Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason RR Assertion A: In a central force field, the work done is independent of the path chosen Reason R: Every force encountered in mechanics does not have an associated potential energy. In the light of the above statements, choose the most appropriate answer from the options given below

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  2. Question 2

    Atoms. Asked once: 8 Apr 2024 (same type asked 3 times) See all 3 of this type

    30
    In an alpha particle scattering experiment distance of closest approach for the α\alpha particle is 4.5×10−14 m4.5 \times10^{- 14}\text{ }m. If target nucleus has atomic number 80 , then maximum velocity of α\alpha-particle is ___ ×105\times10^{5} m/sm/s approximately. (14πϵ0=9×109SI\left( \frac{1}{4\pi\epsilon_{0}}= 9 \times10^{9}SI \right. unit, mass of α\alpha particle == 6.72×10−27 kg6.72 \times10^{- 27}\text{ }kg )
  3. Question 3

    Electromagnetic Induction. Asked once: 2021 Paper 5 (same type asked 3 times) See all 3 of this type

    20
    A conducting bar of length LL is free to slide on two parallel conducting rails as shown in the figure Two resistors R1R_{1} and R2R_{2} are connected across the ends of the rails. There is a uniform magnetic field B→\overrightarrow{B} pointing into the page. An external agent pulls the bar to the left at a constant speed vv. The correct statement about the directions of induced currents I1I_{1} and I2I_{2} flowing through R1R_{1} and R2R_{2} respectively is:

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  4. Question 4

    Electromagnetic Induction. Asked once: 2021 Paper 10 (same type asked 3 times) See all 3 of this type

    16
    The time taken for the magnetic energy to reach 25%25\% of its maximum value, when a solenoid of resistance RR, inductance LL is connected to a battery, is:

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  5. Question 5

    Electrostatics. Asked once: 1 Feb 2024 (same type asked 3 times) See all 3 of this type

    120
    Suppose a uniformly charged wall provides a uniform electric field of 2×104 N/C2 \times10^{4}\text{ }N/C normally. A charged particle of mass 2 g2\text{ }g being suspended through a silk thread of length 20 cm20\text{ }cm and remain stayed at a distance of 10 cm10\text{ }cm from the wall. Then the charge on the particle will be 1xμC\frac{1}{\sqrt{x}}\mu C where x=x = ________ [use  g=10 m/s2]\left. \ g = 10\text{ }m/s^{2} \right\rbrack