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Day 264: JEE Mains Physics

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

  1. Question 1

    Semiconductor Electronics. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    3
    In the given circuit if the power rating of Zener diode is 10 mW10\text{ }mW, the value of series resistance RsR_{s} to regulate the input unregulated supply is:

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  2. Question 2

    Wave Optics. Asked once: 31 Jan 2023 (same type asked 6 times) See all 6 of this type

    7
    Two polaroids A and B are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another polaroid CC is placed between AA and BB bisecting angle between them. If intensity of unpolarized light is I0I_{0} then intensity of transmitted light after passing through polaroid BB will be:

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  3. Question 3

    Mechanical Properties of Fluids. Asked once: 24 Jan 2026 S2 (same type asked 6 times) See all 6 of this type

    25
    A soap bubble of surface tension 0.04 N/m0.04\text{ }N/m is blown to a diameter of 7 cm. If (15000−x)μJ(15000 - x)\mu J of work is done in blowing it further to make its diameter 14 cm, then the value of x is ____\_\_\_\_ . ( π=22/7\pi = 22/7 )

  4. Question 4

    Atoms. Asked once: 4 Apr 2024 (same type asked 6 times) See all 6 of this type

    106
    According to Bohr's theory, the moment of momentum of an electron revolving in 4th 4^{\text{th~}} orbit of hydrogen atom is:

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  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    100
    Monochromatic light of frequency 6×1014 Hz6 \times10^{14}\text{ }Hz is produced by a laser. The power emitted is 2×10−3 W2 \times10^{- 3}\text{ }W. How many photons per second on an average, are emitted by the source ? (Given h=6.63×10−34Jsh = 6.63 \times10^{- 34}Js )

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