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Day 332: JEE Mains Physics

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

  1. Question 1

    Mechanical Properties of Fluids. Asked once: 8 Apr 2024 (same type asked 7 times) See all 7 of this type

    112
    Small water droplets of radius 0.01 mm0.01\text{ }mm are formed in the upper atmosphere and falling with a terminal velocity of 10 cm/s10\text{ }cm/s. Due to condensation, if 8 such droplets are coalesced and formed a larger drop, the new terminal velocity will be _____ cm/scm/s.

  2. Question 2

    Motion in a Plane. Asked once: 31 Jan 2023 (same type asked 7 times) See all 7 of this type

    112
    Two bodies are projected from ground with same speeds 40 ms−140{\text{ }ms}^{- 1} at two different angles with respect to horizontal. The bodies were found to have same range. If one of the body was projected at an angle of 60∘60^{\circ}, with horizontal then sum of the maximum heights, attained by the two projectiles, is____ m. (Given g=10 ms−2g = 10{\text{ }ms}^{- 2} )

  3. Question 3

    Thermodynamics. Asked once: 2021 Paper 17 (same type asked 7 times) See all 7 of this type

    4
    One mole of an ideal gas is taken through an adiabatic process where the temperature rises from 27∘C27^{\circ}C to 37∘C37^{\circ}C. If the ideal gas is composed of polyatomic molecule that has 4 vibrational modes, which of the following is true? [R=8.314 J mol−1k−1]\left\lbrack R = 8.314\text{ }J{\text{ }mol}^{- 1}k^{- 1} \right\rbrack

    Tap an option to check your answer.

  4. Question 4

    Nuclei. Asked once: 8 Apr 2023 (same type asked 7 times) See all 7 of this type

    30
    A nucleus with mass number 242 and binding energy per nucleon as 7.6MeV7.6MeV breaks into fragment each with mass number 121. If each fragment nucleus has binding energy per nucleon as 8.1MeV8.1MeV, the total gain in binding energy is ____\_\_\_\_ MeVMeV.

  5. Question 5

    Alternating Current. Asked once: 27 Jan 2024 (same type asked 7 times) See all 7 of this type

    120
    A series LCR circuit with L=100πmH,C=10−3πFL =\frac{100}{\pi}mH,C =\frac{10^{- 3}}{\pi}F and R=10ΩR = 10\Omega, is connected across an ac source of 220 V,50 Hz220\text{ }V,50\text{ }Hz supply. The power factor of the circuit would be______