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Day 460: JEE Mains Physics

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

  1. Question 1

    Kinetic Theory. Asked once: 28 Jan 2025

    9
    For a particular ideal gas which of the following graphs represents the variation of mean squared velocity of the gas molecules with temperature?

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  2. Question 2

    Laws of Motion. Asked once: 24 Jan 2026 S1

    24
    In the given figure the blocks A,BA,B and C weigh 4 kg,6 kg4\text{ }kg,6\text{ }kg and 8 kg respectively. The co-efficient of sliding friction between any two surfaces is 0.5 . The force F→\overrightarrow{F} required to slide the block C with constant speed is ____\_\_\_\_ N . (Used g=10 m/s2g = 10\text{ }m/s^{2} )

  3. Question 3

    Magnetism and Matter. Asked once: 28 Jan 2025

    85
    A bar magnet has total length 2l=202l = 20 units and the field point PP is at a distance d=10d = 10 units from the centre of the magnet. If the relative uncertainty of length measurement is 1%1\%, then uncertainty of the magnetic field at point PP is :

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  4. Question 4

    Mechanical Properties of Fluids. Asked once: 28 Jan 2025

    3
    Consider following statements: (A) Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface, of a liquid. (B) As the temperature of liquid rises, the coefficient of viscosity increases. (C) As the temperature of gas increases, the coefficient of viscosity increases. (D) The onset of turbulence is determined by Reynold's number. (E) In a steady flow two stream lines never intersect. Choose the correct answer from the options given below :

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  5. Question 5

    Mechanical Properties of Solids. Asked once: 30 Jan 2024

    24
    Each of three blocks P,QP,Q and RR shown in figure has a mass of 3 kg3\text{ }kg. Each of the wire AA and BB has cross-sectional area 0.005 cm20.005{\text{ }cm}^{2} and Young's modulus 2×1011 N m−22 \times10^{11}\text{ }N{\text{ }m}^{- 2}. Neglecting friction, the longitudinal strain on wire BB is_____ ×10−4\times10^{- 4}. (Take g=10 m/s2g = 10\text{ }m/s^{2} )