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Day 306: JEE Mains Physics

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

  1. Question 1

    Atoms. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    113
    If 917Å917\text{Å} be the lowest wavelength of Lyman series then the lowest wavelength of Balmer series will be___ Å\text{Å}.

  2. Question 2

    Current Electricity. Asked once: 2021 Paper 2 (same type asked 3 times) See all 3 of this type

    15
    Figure shows a circuit that contains four identical resistors with resistance R=2.0ΩR= 2.0\Omega. Two identical inductors with inductance L=2.0mHL= 2.0mH and an ideal battery with emf E=9 VE = 9\text{ }V. The current ' ii ' just after the switch ' ss ' is closed will be:

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  3. Question 3

    Electromagnetic Waves. Asked once: 2021 Paper 13 (same type asked 3 times) See all 3 of this type

    5
    The intensity of sunlight at a place on earth is 0.92wm−20.92wm^{- 2}. Find the amplitude of magnetic field at that place.

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  4. Question 4

    Gravitation. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    98
    The time period of a satellite, revolving above earth's surface at a height equal to RR will be (Given g=π2 m/s2,R=g =\pi^{2}\text{ }m/s^{2},R = radius of earth)

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  5. Question 5

    Waves. Asked once: 8 Apr 2023 (same type asked 3 times) See all 3 of this type

    25
    An organ pipe 40 cm40\text{ }cm long is open at both ends. The speed of sound in air is 360 ms−1360{\text{ }ms}^{- 1}. The frequency of the second harmonic is ____Hz\_\_\_\_ Hz.