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Day 177: JEE Mains Physics

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

  1. Question 1

    Kinetic Theory. Asked once: 5 Apr 2024 (same type asked 4 times) See all 4 of this type

    96
    If nn is the number density and dd is the diameter of the molecule, then the average distance covered by a molecule between two successive collisions (i.e. mean free path) is represented by :

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  2. Question 2

    Thermodynamics. Asked once: 24 Jan 2025 (same type asked 4 times) See all 4 of this type

    88
    The magnitude of heat exchanged by a system for the given cyclic process ABCA (as shown in figure) is (in SI unit)

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  3. Question 3

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

    15
    To measure the internal resistance of a battery, potentiometer is used. For R=10ΩR = 10\Omega, the balance point is observed at l=500 cm\mathcal{l =}500\text{ }cm and for R=1ΩR = 1\Omega the balance point is observed at l=400 cm\mathcal{l =}400\text{ }cm. The internal resistance of the battery is approximately:

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  4. Question 4

    Electromagnetic Waves. Asked once: 22 Jan 2026 S1 (same type asked 4 times) See all 4 of this type

    22
    The electric field of a plane electromagnetic wave, travelling in an unknown non-magnetic medium is given by, Ey=20sin⁡(3×106x−4.5×1014t)V/mE_{y} = 20\sin\left( 3 \times 10^{6}x - 4.5 \times 10^{14}t \right)V/m(where x,tx,t and other values have S.I. units). The dielectric constant of the medium is ____\_\_\_\_ (speed of light in free space is 3×108 m/s3 \times 10^{8}\text{ }m/s)

  5. Question 5

    Thermal Properties of Matter. Asked once: 29 Jan 2023 (same type asked 4 times) See all 4 of this type

    94
    Heat energy of 184 kJ184\text{ }kJ is given to ice of mass 600 g600\text{ }g at −12∘C-12^{\circ}C. Specific heat of ice is 2222.3 J kg−1C−12222.3\text{ }J{\text{ }kg}^{- 1}C^{- 1} and latent heat of ice is 336kJkg−1336kJkg^{- 1} A. Final temperature of system will be 0∘C0^{\circ}C. B. Final temperature of the system will be greater than 0∘C0^{\circ}C. C. The final system will have a mixture of ice and water in the ratio of 5:1. D. The final system will have a mixture of ice and water in the ratio of 1:5. E. The final system will have water only. Choose the correct answer from the options given below:

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