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Day 356: JEE Mains Physics

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

  1. Question 1

    Thermodynamics. Asked once: 2021 Paper 11 (same type asked 4 times) See all 4 of this type

    17
    A chamber containing 4 moles of diatomic gas is heated such that the temperature of the gas increases from 0∘C0^{\circ}C to 50∘C50^{\circ}C. Find the change in internal energy of the gas. Assume that molecules are rigid.

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  2. Question 2

    Electrostatics. Asked once: 26 Jul 2022 (same type asked 4 times) See all 4 of this type

    95
    Two uniformly charged spherical conductors A and BB of radii 5 mm5\text{ }mm and 10 mm10\text{ }mm are separated by a large distance. If the spheres are connected by a conducting wire, then in equilibrium condition, the ratio of the magnitudes of the electric fields at the surface of the sphere AA and BB will be:

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  3. Question 3

    Mechanical Properties of Fluids. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    97
    A cube of ice floats partly in water and partly in kerosene oil. The ratio of volume of ice immersed in water to that in kerosene oil (specific gravity of Kerosene oil =0.8= 0.8, specific gravity of ice =0.9= 0.9 )

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  4. Question 4

    Units and Measurements. Asked once: 2021 Paper 24 (same type asked 4 times) See all 4 of this type

    8
    A student determined Young's Modulus of elasticity using the formula Y=MgL34bd3δY =\frac{MgL^{3}}{4bd^{3}\delta}. The value of gg is taken to be 9.8 m/s29.8\text{ }m/s^{2}, without any significant error, his observation are as following. Then the fractional error in the measurement of YY is:

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  5. Question 5

    Kinetic Theory. Asked once: 2021 Paper 6 (same type asked 4 times) See all 4 of this type

    10
    Calculate the value of mean free path (λ)(\lambda) for oxygen molecules at temperature 27∘C27^{\circ}C and pressure 1.01×105 Pa1.01 \times10^{5}\text{ }Pa. Assume the molecular diameter is 0.3 nm0.3\text{ }nm and the gas is ideal. (k=1.38×10−23 J K−1)\left( k = 1.38 \times 10^{-23}\ J\,K^{-1} \right)

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