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Day 156: JEE Mains Physics

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

  1. Question 1

    Ray Optics. Asked once: 8 Apr 2024 (same type asked 6 times) See all 6 of this type

    19
    Critical angle of incidence for a pair of optical media is 45∘45^{\circ}. The refractive indices of first and second media are in the ratio:

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  2. Question 2

    Atoms. Asked once: 2 Apr 2025 (same type asked 6 times) See all 6 of this type

    15
    Considering Bohr's atomic model for hydrogen atom : (A) the energy of H atom in ground state is same as energy of He+{He}^{+}ion in its first excited state. (B) the energy of H atom in ground state is same as that for Li++{Li}^{+ +}ion in its second excited state. (C) the energy of H atom in its ground state is same as that of He+{He}^{+}ion for its ground state. (D) the energy of He+{He}^{+}ion in its first excited state is same as that for Li++{Li}^{+ +}ion in its ground state Choose the correct answer from the options given below :

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  3. Question 3

    Mechanical Properties of Solids. Asked once: 29 Jan 2024 (same type asked 6 times) See all 6 of this type

    111
    Two metallic wires PP and QQ have same volume and are made up of same material. If their area of cross sections are in the ratio 4:14:1 and force F1F_{1} is applied to PP, an extension of Δl\Delta l is produced. The force which is required to produce same extension in QQ is F2F_{2}. The value of F1 F2\frac{F_{1}}{{\text{ }F}_{2}} is ______

  4. Question 4

    Thermodynamics. Asked once: 4 Apr 2025 (same type asked 6 times) See all 6 of this type

    92
    Match List-I with List-II.
    List-IList-II
    (A) Isobaric(I) ΔQ=ΔW\Delta Q = \Delta W
    (B) Isochoric(II) ΔQ=ΔU\Delta Q = \Delta U
    (C) Adiabatic(III) ΔQ=\Delta Q = zero
    (D) Isothermal(IV) ΔQ=ΔU+PΔV\Delta Q = \Delta U + P\Delta V
    ΔQ=\Delta Q = Heat supplied ΔW=\Delta W = Work done by the system ΔU=\Delta U = Change in internal energy P=P = Pressure of the system ΔV=\Delta V = Change in volume of the system. Choose the correct answer from the options given below :

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  5. Question 5

    Atoms. Asked once: 2 Apr 2025 (same type asked 6 times) See all 6 of this type

    86
    Assuming the validity of Bohr's atomic model for hydrogen like ions the radius of Li++Li^{+ +}ion in its ground state is given by 1Xa0\frac{1}{X}a_{0}, where X=X= . (Where a0a_{0} is the first Bohr's radius.)

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