8 April 2023 physics questions with solutions

Showing 1–10 of 57 questions

• NumericmediumRotational Motionrolling on inclined surface

  A hollow spherical ball of uniform density rolls up a curved surface with an initial velocity 3 m/s (as shown in figure). Maximum height with respect to the initial position covered by it will be _________ cm (take, g = 10 m s⁻²)

  

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  JEE Mains8 April 2023Shift 2Evening Shift

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• NumericmediumGeometrical opticslaw of reflection and plane mirror

  Two vertical parallel mirrors A and B are separated by 10 cm. A point object O is placed at a distance of 2 cm from mirror A. The distance of the second nearest image behind mirror A from the mirror A is _________ cm.

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• MCQeasyNuclear physicsradioactivity and law of decay

  A radioactive material is reduced to 1/8 of its original amount in 3 days. If 8 × 10⁻³ kg of the material is left after 5 days, the initial amount of the material is:

  Options

  • Option A

    64 g

  • Option B

    40 g

  • Option C

    32 g

  • Option D

    256 g

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• MCQmediumKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  Two projectiles A and B are thrown with initial velocities of 40 m/s and 60 m/s at angles 30° and 60° with the horizontal respectively. The ratio of their ranges respectively is (g = 10 m s⁻²)

  Options

  • Option A

    2: 3

  • Option B

    3: 2

  • Option C

    4: 9

  • Option D

    1: 1

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• NumericmediumAtomic Structure and X-raysatomic structure and bohr atomic model

  The ratio of wavelengths of $H_{\alpha}$ and $H_{\beta}$ lines in the Balmer series is x/20. Find x.

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• NumericmediumAC Circuitsseries combination of ac circuit and L-C-R circuit

  A series combination of a 100 Ω resistor, 1 H inductor and 6.25 μF capacitor is connected to an AC source. The quality factor of the circuit is ______.

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• MCQmediumElectrostaticelectric flux and gauss law

  Graphical variation of electric field due to a uniformly charged insulating solid sphere of radius R, with distance r from the centre O is represented by:

  

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQeasyPhotoelectric effect and dual nature of matterdebroglie duel nature of light

  Proton (P) and electron (e) will have same de-Broglie wavelength when the ratio of their momentum is (assume, mp = 1849 me):

  Options

  • Option A

    1: 43

  • Option B

    43: 1

  • Option C

    1: 1849

  • Option D

    1: 1

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• MCQmediumWave Motiondoppler effect

  The engine of a train moving with speed 10 m s⁻¹ towards a platform sounds a whistle at frequency 400 Hz. The frequency heard by a passenger inside the train is: (neglect air speed. Speed of sound in air = 330 m s⁻¹)

  Options

  • Option A

    400 Hz

  • Option B

    388 Hz

  • Option C

    200 Hz

  • Option D

    412 Hz

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• MCQmediumGravitationSatellites, Orbital Motion & Kepler’s Laws

  Given below are two statements:

  Statement I: If E is the total energy of a satellite moving around the Earth, then its potential energy is E/2.

  Statement II: The kinetic energy of a satellite revolving in an orbit is equal to half the magnitude of total energy E.

  In the light of the above statements, choose the most appropriate answer from the options given below:

  Options

  • Option A

    Both Statement I and Statement II are incorrect

  • Option B

    Statement I is incorrect but Statement II is correct

  • Option C

    Statement I is correct but Statement II is incorrect

  • Option D

    Both Statement I and Statement II are correct

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