JEE Mains 2026 4 April Evening Shift physics questions with solutions

Showing 1–10 of 24 questions

• MCQmediumElectrostaticselectric dipole and dipole moment

  A rigid electric dipole performs small angular oscillations about its centre in a uniform electric field E₁ = E₀î. A second field E₂ = 2E₀(ĵ+k̂) is then added. Approximately what is the percentage increase in the oscillation frequency?

  Options

  • Option A

    73%

  • Option B

    63%

  • Option C

    83%

  • Option D

    53%

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• MCQmediumWave Opticspolarisation

  Unpolarized light of intensity I₀ first passes through a polarizer whose transmission axis is at 30° to the horizontal and then through an analyser whose axis is at 90°. A third polarizer with axis at 60° is inserted between them. What is the ratio of the output intensity with the third polarizer to the output intensity without it?

  Options

  • Option A

    3 / 4

  • Option B

    4 /3

  • Option C

    9 / 4

  • Option D

    4 /9

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• MCQmediumSimple Harmonic Motionphysical pendulam and torsional pendulam ,combination of shm

  A uniform disc of mass M and radius R can oscillate in its own plane about a fixed horizontal axis passing through a point A on its rim, as shown in the figure. For small angular oscillations under gravity, what is its time period?

  

  Options

  • Option A

    2π√[5R / (4g)]

  • Option B

    2π√[2R / (3g)]

  • Option C

    2π√[3R / (2g)]

  • Option D

    2π√(3R / g)

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• MCQmediumAtomic Structure and X-raysatomic structre and bohr atomic model

  In Rutherford's α-particle scattering experiment, only a very small fraction of incident α-particles rebound or undergo very large-angle scattering. Consider the following statements.

  A. The gold nucleus is extremely small compared with the size of the atom.
  B. An α-particle and a gold nucleus carry equal positive charge.
  C. Only a few α-particles have very small impact parameter.
  D. Only a few α-particles have exceptionally large kinetic energy. E. Only a few α-particles undergo nearly head-on collisions with nuclei.

  Which statements correctly explain the observation?

  Options

  • Option A

    A and B only

  • Option B

    B and E only

  • Option C

    C and D only

  • Option D

    A, C and E only

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• IntegermediumMagnetism and matterpole stength ,magnetic moment and magnetic field due to magnet

  Two identical small bar magnets, each having magnetic dipole moment 3√5 J·T⁻¹, are placed with their axes perpendicular to each other as shown in the figure. Their centre-to-centre separation is 10 cm, and point P is midway between them. Taking μ₀ = 4π×10⁻⁷ T·m·A⁻¹, if the net magnetic field at P is α×10⁻³ T, find α.

  

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• MCQmediumMagnetic effect of currentampere's law and its application

  A solenoid contains a core of relative permeability μᵣ = 400. The magnetic field inside the solenoid is 1.0 T. If the magnetic field intensity is written as H = α×10⁵ A·m⁻¹ and μ₀ = 4π×10⁻⁷ T·m·A⁻¹, what is α?

  Options

  • Option A

    25 /π

  • Option B

    1 /(16π)

  • Option C

    1 /π

  • Option D

    1 /(4π)

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• A/RmediumCapacitorcapacitor with dielectric

  Choose the correct option for the following Assertion (A) and Reason (R).

  Assertion

  In electrostatic equilibrium, a conductor does not store any net excess charge in its interior bulk.

  Reason

  In the region between the plates of a capacitor containing no dielectric, a free charge carrier placed in the electric field experiences a force and drifts.

  Options

  • Option A

    Both A and R are true and R is the correct explanation of A.

  • Option B

    Both A and R are true but R is NOT the correct explanation of A.

  • Option C

    A is true but R is false.

  • Option D

    A is false but R is true.

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• MCQeasyFluid Mechanicsequation of continuity and bornullie theorem

  A water spray gun is connected to a hose of cross-sectional area 30 cm². The gun has 10 identical perforations, each of cross-sectional area 15 mm². Water flows in the hose with speed 50 cm·s⁻¹. Neglecting edge effects, what is the speed of water emerging from each perforation?

  Options

  • Option A

    100 m·s⁻¹

  • Option B

    10 m·s⁻¹

  • Option C

    1000 m·s⁻¹

  • Option D

    1.5×10³ m·s⁻¹

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• MCQeasyGeometrical opticslens and combination lens,silvered lens

  A symmetric biconvex lens is made of glass of refractive index 1.4. The two spherical surfaces have equal radius of curvature R in magnitude. What is the ratio f / R, where f is the focal length of the lens in air?

  Options

  • Option A

    0.5

  • Option B

    2.5

  • Option C

    0.8

  • Option D

    1.25

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• MCQmediumThermodyanmicsthermal expansion solid and liquid

  A metal strip has coefficient of linear expansion α. Its temperature is first increased from T₁ to T₂, causing its length to increase by ΔL₁. It is then heated from T₂ to T₃, causing an additional increase ΔL₂. Given T₃+T₁ = 2T₂ and T₂-T₁ = ΔT, which expression gives ΔL₂ according to the finite-step expansion treatment used in the source solution?

  Options

  • Option A

    ΔL₁[1+2α²(ΔT)²]

  • Option B

    ΔL₁[1+α²(ΔT)²]

  • Option C

    ΔL₁[1+2αΔT]

  • Option D

    ΔL₁[1+αΔT]

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