PYQ Vault
EbooksTutor

Day 315: JEE Mains Physics

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

  1. Question 1

    Oscillations. Asked once: 1 Feb 2023 (same type asked 3 times) See all 3 of this type

    111
    A block is fastened to a horizontal spring. The block is pulled to a distance x=10 cmx = 10\text{ }cm from its equilibrium position (at x=0x = 0 ) on a frictionless surface from rest. The energy of the block at x=5 cmx = 5\text{ }cm is 0.25 J0.25\text{ }J. The spring constant of the spring is ____\_\_\_\_ Nm−1Nm^{- 1}

  2. Question 2

    System of Particles and Rotational Motion. Asked once: 30 Jan 2024 (same type asked 3 times) See all 3 of this type

    28
    Consider a Disc of mass 5 kg5\text{ }kg, radius 2 m2\text{ }m, rotating with angular velocity of 10rad/s10rad/s about an axis perpendicular to the plane of rotation. An identical disc is kept gently over the rotating disc along the same axis. The energy dissipated so that both the discs continue to rotate together without slipping is  _____\ \_\_\_\_\_J

  3. Question 3

    Gravitation. Asked once: 8 Apr 2023 (same type asked 3 times) See all 3 of this type

    7
    The weight of a body on the earth is 400 N400\text{ }N. Then weight of the body when taken to a depth half of the radius of the earth will be:

    Tap an option to check your answer.

  4. Question 4

    Oscillations. Asked once: 29 Jan 2023 (same type asked 3 times) See all 3 of this type

    113
    A particle of mass 250 g250\text{ }g executes a simple harmonic motion under a periodic force F=(−25x)NF = ( - 25x)N. The particle attains a maximum speed of 4 m/s4\text{ }m/s during its oscillation. The amplitude of the motion is____ cmcm.

  5. Question 5

    Atoms. Asked once: 14 Jun 2022 (same type asked 3 times) See all 3 of this type

    110
    In Bohr's atomic model of hydrogen, let K, P and E be the kinetic energy, potential energy and total energy of the electron respectively. Choose the correct option when the electron undergoes transitions to a higher level:

    Tap an option to check your answer.