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Day 53: JEE Mains Physics

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

  1. Question 1

    Waves. This type asked 4 times: 2021 Paper 3, 2021 Paper 21, 28 Jun 2022, 29 Jun 2022. This one: 29 Jun 2022 See all 4 of this type

    113
    In an experiment to determine the velocity of sound in air at room temperature using a resonance is observed when the air column has a length of 20.0 cmcm for a tuning fork of frequency 400 Hz400\text{ }Hz is used. The velocity of the sound at room temperature is 336 ms−1336{\text{ }ms}^{- 1}. The third resonance is observed when the air column has a length of ____\_\_\_\_ cm.

  2. Question 2

    Thermal Properties of Matter. Asked 3 times: 2021 Paper 20, 30 Jan 2023*, 5 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    9
    An ideal gas at pressure PP and temperature TT is expanding such that PT3=PT^{3}= constant. The coefficient of volume expansion of the gas is ____\_\_\_\_ .

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  3. Question 3

    Mechanical Properties of Solids. Asked 3 times: 29 Jul 2022*, 30 Jan 2024*, 5 Apr 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked

    6
    The Young's modulus of steel wire of radius rr and length L is Y . If the radius r and length L of the wire are doubled then the value of Y

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  4. Question 4

    Kinetic Theory. Asked 3 times: 2021 Paper 23*, 27 Jun 2022*, 2 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    9
    A mixture of carbon dioxide and oxygen has volume 8310 cm38310{\text{ }cm}^{3}, temperature 300 K , pressure 100 kPa and mass 13.2 g . The number of moles of carbon dioxide and oxygen gases in the mixture respectively are ____\_\_\_\_ .(Assume both carbon dioxide and oxygen gases behave like ideal gases) [ R=8.31 J/mol.KR = 8.31\text{ }J/mol.K ]

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  5. Question 5

    Mechanical Properties of Fluids. Asked 3 times: 28 Jul 2022*, 8 Apr 2023*, 2 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    10
    If an air bubble of diameter 2 mm rises steadily through a liquid of density 2000 kg/m32000\text{ }kg/m^{3} at a rate of 0.5 cm/s0.5\text{ }cm/s, then the coefficient of viscosity of liquid is ____\_\_\_\_ Poise. (Take g=10 m/s2g = 10\text{ }m/s^{2} )

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