JEE Mains 2023 24 jan morning shift physics questions with solutions

Showing 1–9 of 9 questions

• NumericmediumElectrostaticsElectric field intensity

  A stream of positively charged particles having q/m = 2 × 10¹¹ C/kg and velocity v₀ = 3 × 10⁷ m/s along +x direction is deflected by an electric field of magnitude 1.8 kV/m along +y direction. The electric field exists in a region of 10 cm along x direction. Due to the electric field, the deflection of the charged particles in the y direction is _____ mm.

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• NumericmediumCurrent electricityelectric current ,current density and resistance

  A hollow cylindrical conductor has length of 3.14 m, while its inner and outer diameters are 4 mm and 8 mm respectively. The resistance of the conductor is n × 10⁻³ Ω. If the resistivity of the material is 2.4 × 10⁻⁸ Ωm. The value of n is ______ .

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• NumericmediumRotational Motionmoment of inertia and kinetic energy in pure rotation

  Solid sphere A is rotating about an axis PQ. If the radius of the sphere is 5 cm then its radius of gyration about PQ will be √x cm. The value of x is ______ .

  

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• MCQeasyElectromagnetic Inductionfaradays law and question based on it

  A conducting loop of radius 10/√π cm is placed perpendicular to a uniform magnetic field of 0.5T. The magnetic field is decreased to zero in 0.5 s at a steady rate. The induced emf in the circular loop at 0.25 s is:

  Options

  • Option A

    emf = 1 mV

  • Option B

    emf = 10 mV

  • Option C

    emf = 100 mV

  • Option D

    emf = 5 mV

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• MatchmediumUnit dimension and errorDimension and its application

  Match List I with List II

  List 1

  1. Planck’s constant (h)

  2. Stopping potential (Vₛ)

  3. Work function (ϕ)

  4. Momentum (p)

  List 2

  1. I. [M¹L²T⁻²]

  2. II. [M¹L¹T⁻¹]

  3. III. [M¹L²T⁻¹]

  4. IV. [M¹L²T⁻³A⁻¹]

  Options

  • Option A

    A-III, B-I, C-II, D-IV

  • Option B

    A-III, B-IV, C-I, D-II

  • Option C

    A-II, B-IV, C-III, D-I

  • Option D

    A-I, B-III, C-IV, D-II

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• MCQmediumCurrent electricitycircuit theory

  As shown in the figure, a network of resistors is connected to a battery of 24 V with an internal resistance of 3Ω. The currents through the resistors R₄ and R₅ are I₄ and I₅ respectively. The values of I₄ and I₅ are :

  

  Options

  • Option A

    I₄ = 8/5 A and I₅ = 2/5 A

  • Option B

    I₄ = 24/5 A and I₅ = 6/5 A

  • Option C

    I₄ = 6/5 A and I₅ = 24/5 A

  • Option D

    I₄ = 2/5 A and I₅ = 8/5 A

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• MCQeasyGravitationacceleration due to gravity and escape velocity

  The weight of a body at the surface of earth is 18 N. The weight of the body at an altitude of 3200 km above the earth’s surface is (given, radius of earth Rₑ = 6400 km)

  Options

  • Option A

    9.8 N

  • Option B

    4.9 N

  • Option C

    19.6 N

  • Option D

    8 N

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• NumericmediumSimple Harmonic Motiontime period by energy method

  A block of mass 2 kg is attached with two identical springs of spring constant 20 N/m each. The block is placed on a frictionless surface and the ends of the springs are attached to rigid supports (see figure). When the mass is displaced from its equilibrium position, it executes a simple harmonic motion. The time period of oscillation is π/√x in SI unit. The value of x is ____________ .

  

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• MCQmediumElectrostaticselectric charge and coulamb's law

  If two charges q₁ and q₂ are separated with distance ‘d’ and placed in a medium of dielectric constant K. What will be the equivalent distance between charges in air for the same electrostatic force ?

  Options

  • Option A

    d√K

  • Option B

    K√d

  • Option C

    1.5d√K

  • Option D

    2d√K

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