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Day 188: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. Asked once: 5 Apr 2024 (same type asked 4 times) See all 4 of this type

    120
    The current in an inductor is given by I=(3t+8)I = (3t + 8) where tt is in second. The magnitude of induced emf produced in the inductor is 12mV12mV. The self-inductance of the inductor is ____\_\_\_\_ mHmH.

  2. Question 2

    Current Electricity. Asked once: 29 Jun 2022 (same type asked 4 times) See all 4 of this type

    97
    A capacitor is discharging through a resistor RR. Consider in time t1t_{1}, the energy stored in the capacitor reduces to half of its initial value and in time t2t_{2}, the charge stored reduces to one eighth of its initial value. The ratio t1/t2t_{1}/t_{2} will be:

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  3. Question 3

    Moving Charges and Magnetism. Asked once: 13 Apr 2023 (same type asked 4 times) See all 4 of this type

    120
    A straight wire ABAB of mass 40 g40\text{ }g and length 50 cm50\text{ }cm is suspended by a pair of flexible leads in uniform magnetic field of magnitude 0.40 T0.40\text{ }T as shown in the figure. The magnitude of the current required in the wire to remove the tension in the supporting leads is ____A. (Take  g=10 ms−2)\left. \ g = 10{\text{ }ms}^{- 2} \right).

  4. Question 4

    Electrostatics. Asked once: 30 Jan 2024 (same type asked 4 times) See all 4 of this type

    103
    A particle of charge ' −q-q ' and mass ' mm ' moves in a circle of radius ' rr ' around an infinitely long line charge of linear density ' +λ+\lambda '. Then time period will be given as: (Consider k as Coulomb's constant)

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  5. Question 5

    Kinetic Theory. Asked once: 30 Jan 2024 (same type asked 4 times) See all 4 of this type

    106
    If three moles of monoatomic gas (γ=53)\left( \gamma = \frac{5}{3} \right) is mixed with two moles of a diatomic gas (γ=75)\left( \gamma = \frac{7}{5} \right), the value of adiabatic exponent γ\gamma for the mixture is:

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