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Day 49: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. This type asked 4 times: 26 Jun 2022, 15 Apr 2023, 5 Apr 2024, 6 Apr 2024. This one: 6 Apr 2024 See all 4 of this type

    99
    In a coil, the current changes from −2 A- 2\text{ }A to +2 A+ 2\text{ }A in 0.2 s0.2\text{ }s and induces an emf of 0.1 V0.1\text{ }V. The self-inductance of the coil is:

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  2. Question 2

    Current Electricity. This type asked 4 times: 2021 Paper 16, 2021 Paper 24, 29 Jun 2022, 5 Apr 2024. This one: 5 Apr 2024 See all 4 of this type

    23
    The electric field between the two parallel plates of a capacitor of 1.5μF1.5\mu F capacitance drops to one third of its initial value in 6.6μs6.6\mu s when the plates are connected by a thin wire. The resistance of this wire is ................ Ω\Omega. (Given, log⁡3=1.1\log3 = 1.1 )

  3. Question 3

    Moving Charges and Magnetism. This type asked 4 times: 28 Jul 2022, 30 Jan 2023, 13 Apr 2023, 5 Apr 2024. This one: 5 Apr 2024 See all 4 of this type

    22
    A 2A current carrying straight metal wire of resistance 1Ω1\Omega, resistivity 2×10−6Ωm2 \times10^{- 6}\Omega m, area of cross-section 10 mm210{\text{ }mm}^{2} and mass 500 g500\text{ }g is suspended horizontally in mid air by applying a uniform magnetic field B→\overrightarrow{B}. The magnitude of BB is _____ ×10−1 T\times10^{- 1}\text{ }T (given, g=10 m/s2g = 10\text{ }m/s^{2} )

  4. Question 4

    Electrostatics. This type asked 4 times: 14 Jun 2022, 10 Apr 2023, 30 Jan 2024, 4 Apr 2024. This one: 4 Apr 2024 See all 4 of this type

    16
    An infinitely long positively charged straight thread has a linear charge density λCm−1\lambda Cm^{- 1}. An electron revolves along a circular path having axis along the length of the wire. The graph that correctly represents the variation of the kinetic energy of electron as a function of radius of circular path from the wire is:

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  5. Question 5

    Kinetic Theory. This type asked 4 times: 29 Jul 2022, 29 Jan 2024, 30 Jan 2024, 1 Feb 2024. This one: 1 Feb 2024 See all 4 of this type

    6
    Two moles of a monoatomic gas is mixed with six moles of a diatomic gas. The molar specific heat of the mixture at constant volume is:

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