JEE Mains 2024 01 Feb Evening Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQeasyNuclear physicsNuclear Properties, Mass Defect & Binding Energy

  From the statements given below:

  (A) The angular momentum of an electron in nth orbit is an integral multiple of h.
  (B) Nuclear forces do not obey inverse square law.
  (C) Nuclear forces are spin dependent.
  (D) Nuclear forces are central and charge independent. (E) Stability of nucleus is inversely proportional to the value of packing fraction.

  Choose the correct answer from the options given below:

  Options

  • Option A

    (A), (B), (C), (D) only

  • Option B

    (A), (C), (D), (E) only

  • Option C

    (A), (B), (C), (E) only

  • Option D

    (B), (C), (D), (E) only

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• MCQeasyElectromagnetic InductionMutual Inductance, L-C Oscillations and Transformers

  A transformer has an efficiency of 80% and works at 10 V and 4 kW. If the secondary voltage is 240 V, then the current in the secondary coil is:

  Options

  • Option A

    1.59 A

  • Option B

    13.33 A

  • Option C

    1.33 A

  • Option D

    15.1 A

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• NumericmediumAtomic Structure and X-raysAtomic Structure & Bohr's Atomic Model

  A particular hydrogen-like ion emits radiation of frequency 3 × 10¹⁵ Hz when it makes transition from n = 2 to n = 1. The frequency of radiation emitted in transition from n = 3 to n = 1 is (x/9) × 10¹⁵ Hz, where x = ______.

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• NumericmediumRotational MotionCombined Translational & Rotational Motion

  A uniform rod AB of mass 2 kg and length 30 cm is at rest on a smooth horizontal surface. An impulse of force 0.2 N s is applied to end B. The time taken by the rod to turn through a right angle will be π/x s, where x = ____. Image

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• MCQmediumGravitationSatellites, Orbital Motion & Kepler’s Laws

  A light planet is revolving around a massive star in a circular orbit of radius R with a period of revolution T. If the force of attraction between planet and star is proportional to R⁻³ᐟ², then choose the correct option:

  Options

  • Option A

    T² ∝ R⁵ᐟ²

  • Option B

    T² ∝ R⁷ᐟ²

  • Option C

    T² ∝ R³ᐟ²

  • Option D

    T² ∝ R³

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• MCQeasyKinematics part-3 Relative motionRelative motion in 2-D and shortest distance problem

  Train A is moving along two parallel rail tracks towards north with speed 72 km/h and train B is moving towards south with speed 108 km/h. Velocity of train B with respect to A and velocity of ground with respect to B are (in m s⁻¹):

  Options

  • Option A

    -30 and 50

  • Option B

    -50 and -30

  • Option C

    -50 and 30

  • Option D

    50 and -30

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• NumericmediumKinematics Part-1 (one dimension)Acceleration and Avg acceleration

  A particle initially at rest starts moving from reference point x = 0 along x-axis, with velocity v that varies as v = 4√x m/s. The acceleration of the particle is ____ m s⁻².

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• NumericmediumWave OpticsYoung's Double-Slit Experiment (YDSE)

  In Young's double slit experiment, monochromatic light of wavelength 5000 Å is used. The slits are 1.0 mm apart and screen is placed at 1.0 m away from slits. The distance from the centre of the screen where intensity becomes half of the maximum intensity for the first time is ____ × 10⁻⁶ m.

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• NumericmediumProperties of solid and fluidElastic Properties of Solids: Stress, Strain and Elastic Moduli

  One end of a metal wire is fixed to a ceiling and a load of 2 kg hangs from the other end. A similar wire is attached to the bottom of the load and another load of 1 kg hangs from this lower wire. Then the ratio of longitudinal strain of upper wire to that of the lower wire will be ____. [Area of cross section of wire = 0.005 cm², Y = 2 × 10¹¹ N m⁻² and g = 10 m s⁻²]

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• MCQmediumWave OpticsDiffraction of Light

  A microwave of wavelength 2.0 cm falls normally on a slit of width 4.0 cm. The angular spread of the central maxima of the diffraction pattern obtained on a screen 1.5 m away from the slit, will be:

  Options

  • Option A

    30°

  • Option B

    15°

  • Option C

    60°

  • Option D

    45°

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