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Day 339: JEE Mains Physics

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

  1. Question 1

    Ray Optics. Asked once: 26 Jul 2022 (same type asked 6 times) See all 6 of this type

    97
    Light travels in two media M1M_{1} and M2M_{2} with speeds 1.5×108 ms−11.5 \times10^{8}{\text{ }ms}^{- 1} and 2.0×108 ms−12.0 \times10^{8}{\text{ }ms}^{- 1} respectively. The critical angle between them is:

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  2. Question 2

    Atoms. Asked once: 1 Feb 2023 (same type asked 6 times) See all 6 of this type

    94
    An electron of a hydrogen like atom, having Z=4Z = 4, jumps from 4th 4^{\text{th~}} energy state to 2nd 2^{\text{nd~}} energy state. The energy released in this process, will be: (Given Rch =13.6eV= 13.6eV ) Where R=R = Rydberg constant c=c = Speed of light in vacuum h=h = Planck's constant

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  3. Question 3

    Mechanical Properties of Solids. Asked once: 30 Jan 2023 (same type asked 6 times) See all 6 of this type

    107
    A force is applied to a steel wire 'A', rigidly clamped at one end. As a result elongation in the wire is 0.2 mm0.2\text{ }mm. If same force is applied to another steel wire ' BB ' of double the length and a diameter 2.4 times that of the wire 'A', the elongation in the wire ' BB ' will be (wires having uniform circular cross sections)

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  4. Question 4

    Thermodynamics. Asked once: 11 Apr 2023 (same type asked 6 times) See all 6 of this type

    103
    The thermodynamic process, in which internal energy of the system remains constant is

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  5. Question 5

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

    26
    The radius of fifth orbit of the Li++Li^{+ +}is ___×10−12\_\_\_ \times10^{- 12} mm. Take: radius of hydrogen atom =0.51Å= 0.51\text{Å}