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Day 131: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. This type asked 2 times: 30 Jan 2023, 13 Apr 2023. This one: 13 Apr 2023 See all 2 of this type

    9
    A bullet 10 g10\text{ }g leaves the barrel of gun with a velocity of 600 m/s600\text{ }m/s. If the barrel of gun is 50 cm50\text{ }cm long and mass of gun is 3 kg3\text{ }kg, then value of impulse supplied to the gun will be:

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  2. Question 2

    Magnetism and Matter. This type asked 2 times: 27 Jul 2022, 12 Apr 2023. This one: 27 Jul 2022 See all 2 of this type

    12
    Two bar magnets oscillate in a horizontal plane in earth's magnetic field with time periods of 3 s3\text{ }s and 4 s4\text{ }s respectively. If their moments of inertia are in the ratio of 3:23:2 then the ratio of their magnetic moments will be:

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  3. Question 3

    Current Electricity. This type asked 2 times: 29 Jun 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 2 of this type

    7
    Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be:

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  4. Question 4

    Kinetic Theory. This type asked 2 times: 29 Jul 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 2 of this type

    106
    The root mean square speed of molecules of nitrogen gas at 27∘C27^{\circ}C is approximately: (Given mass of a nitrogen molecule =4.6×10−26 kg= 4.6 \times10^{- 26}\text{ }kg and take Boltzmann constant kB=1.4×10−23JK−1k_{B}= 1.4 \times10^{- 23}JK^{- 1} )

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  5. Question 5

    Ray Optics. This type asked 2 times: 26 Jun 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 2 of this type

    100
    When one light ray is reflected from a plane mirror with 30∘30^{\circ} angle of reflection, the angle of deviation of the ray after reflection is:

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