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Day 448: JEE Mains Physics

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

  1. Question 1

    Current Electricity. Asked once: 5 Apr 2026 S1

    9
    Refer to the figure given below. The values of I1,I2I_{1},I_{2} and I3I_{3} are ____\_\_\_\_ .

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  2. Question 2

    Dual Nature of Radiation and Matter. Asked once: 7 Apr 2025

    80
    A photo-emissive substance is illuminated with a radiation of wavelength λi\lambda_{i} so that it releases electrons with de-Broglie wavelength λe\lambda_{e}. The longest wavelength of radiation that can emit photoelectron is λ0\lambda_{0}. Expression for de-Broglie wavelength is given by : (m : mass of the electron, h : Planck's constant and c : speed of light)

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  3. Question 3

    Electromagnetic Induction. Asked once: 23 Jan 2026 S2

    16
    A circular loop of radius 7 cm is placed in uniform magnetic field of 0.2 T directed perpendicular to plane of loop. The loop is converted into a square loop in 0.5 s . The EMF induced in the loop is ____\_\_\_\_ mV.

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  4. Question 4

    Electromagnetic Waves. Asked once: 7 Apr 2025

    5
    If ϵ0\epsilon_{0} denotes the permittivity of free space and ΦE\Phi_{E} is the flux of the electric field through the area bounded by the closed surface, then dimension of (ϵ0 dϕEdt)\left( \epsilon_{0}\frac{\text{ }d\phi_{E}}{dt} \right) are that of :

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  5. Question 5

    Electrostatics. Asked once: 4 Apr 2026 S1

    15
    A parallel plate air capacitor is connected to a battery. The plates are pulled apart at uniform speed vv. If x is the separation between the plates at any instant, then the time rate of change of electrostatic energy of the capacitor is proportional to xαx^{\alpha}, where α\alpha is ____\_\_\_\_ .

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