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Day 337: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 29 Jan 2023 (same type asked 6 times) See all 6 of this type

    21
    As shown in the figure, three identical polaroids P1,P2P_{1},P_{2} and P3P_{3} are placed one after another. The pass axis of P2P_{2} and P3P_{3} are inclined at angle of 60∘60^{\circ} and 90∘90^{\circ} with respect to axis of P1P_{1}. The source SS has an intensity of 256Wm2256\frac{W}{m^{2}}. The intensity of light at point OO is ____\_\_\_\_ Wm2\frac{W}{m^{2}}.

  2. Question 2

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

    26
    A soap bubble is blown to a diameter of 7 cm7\text{ }cm. 36960 erg of work is done in blowing it further. If surface tension of soap solution is 40 dyne/cm then the new radius is ____ cmcm. Take :(π=227):\left( \pi =\frac{22}{7} \right).

  3. Question 3

    Atoms. Asked once: 10 Apr 2023 (same type asked 6 times) See all 6 of this type

    6
    The angular momentum for the electron in Bohr's orbit is L. If the electron is assumed to revolve in second orbit of hydrogen atom, then the change in angular momentum will be:

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  4. Question 4

    Dual Nature of Radiation and Matter. Asked once: 29 Jan 2024 (same type asked 6 times) See all 6 of this type

    91
    Two sources of light emit with a power of 200 W200\text{ }W. The ratio of number of photons of visible light emitted by each source having wavelengths 300 nmnm and 500 nm500\text{ }nm respectively, will be:

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  5. Question 5

    Nuclei. Asked once: 31 Jan 2024 (same type asked 6 times) See all 6 of this type

    105
    The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is:

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