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Day 496: JEE Mains Physics

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

  1. Question 1

    Work, Energy and Power. Asked once: 22 Jan 2025

    91
    A ball of mass 100 g is projected with velocity 20 m/s20\text{ }m/s at 60∘60^{\circ} with horizontal. The decrease in kinetic energy of the ball during the motion from point of projection to highest point is :

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  2. Question 2

    Alternating Current. Asked once: 30 Jan 2023

    97
    In the given circuit, rms value of current (Irms)\left( I_{rms} \right) through the resistor RR is:

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  3. Question 3

    Atoms. Asked once: 6 Apr 2023

    17
    The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength is

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  4. Question 4

    Current Electricity. Asked once: 22 Jan 2026 S2

    24
    A cylindrical conductor of length 2 m and area of cross-section 0.2 mm20.2{\text{ }mm}^{2} carries an electric current of 1.6 A when its ends are connected to a 2 V battery. Mobility of electrons in the conductor is α×10−3 m2/V\alpha \times 10^{- 3}{\text{ }m}^{2}/V.s. The value of α\alpha is : (electron concentration =5×1028/m3= 5 \times 10^{28}/m^{3} and electron charge =1.6×10−19C= 1.6 \times 10^{- 19}C )

  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 13 Apr 2023

    106
    Given below are two statements: Statement I: Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a metallic surface. Statement II: Above the threshold frequency, the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light. In the light of above statements, choose the correct answer from the options given below

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