JEE Mains 2025 24 Jan Morning Shift physics questions with solutions

Showing 1–10 of 20 questions

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

  An electron makes transition A→C emitting wavelength 2000 Å and B→C emitting wavelength 6000 Å. The wavelength emitted in transition A→B is:

  Options

  • Option A

    3000 Å

  • Option B

    4000 Å

  • Option C

    8000 Å

  • Option D

    2000 Å

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• MCQmediumGravitationsattelite and keplers law

  Satellite A is in a circular orbit of radius R. Satellite B is in a circular orbit of radius 1.03R. The time period of B is greater than that of A by approximately:

  Options

  • Option A

    9%

  • Option B

    4.5%

  • Option C

    3%

  • Option D

    2.5%

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• MCQeasyThermodyanmicsthermodynmic process and work done

  For an ideal gas, pressure is directly proportional to absolute temperature during a process. Statements: A: process is isochoric; B: work done is zero; C: internal energy increases when temperature increases. Choose the correct option.

  Options

  • Option A

    A and B are correct

  • Option B

    A and C are correct

  • Option C

    A, B and C are correct

  • Option D

    B and C are correct

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• MCQmediumPhotoelectric effect and dual nature of matterdebrogllie duel nature of light

  An electron of mass m enters a uniform electric field $\vec{E}$=-E₀k̂ at t=0 with initial velocity $\vec{v}$=V₀î. If its initial de-Broglie wavelength is λ₀, its de-Broglie wavelength at time t is:

  Options

  • Option A

    λ₀√(1+m²V₀²/(e²E₀²t²))

  • Option B

    λ₀√(1+e²E₀²t²/(m²V₀²))

  • Option C

    λ₀/√(1+e²E₀²t²/(m²V₀²))

  • Option D

    λ₀/√(1+m²V₀²/(e²E₀²t²))

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• MCQeasyCapacitorconnecting of capacitor with battery,connenctiong of two capacitor

  A parallel-plate capacitor has plate area A, separation d and electric field E between the plates. Its stored energy is:

  Options

  • Option A

    (1/2)ε₀E²Ad

  • Option B

    (1/4)ε₀E²Ad

  • Option C

    ($\frac{3}{4}$)ε₀E²Ad

  • Option D

    ε₀E²Ad

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• MCQeasyGeometrical opticslens and combination lens,silvered lens

  The optical power of a lens is increased from 0.1 D to 2.5 D. The magnitude of relative shift in focal length |Δf|/f₁ is:

  Options

  • Option A

    24/25

  • Option B

    13/10

  • Option C

    21/25

  • Option D

    11/10

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• MCQeasyAc Cirucuitsavg value and rms value of ac

  If I=$I_A$ sinωt + $I_B$ cosωt, the rms value of current is:

  Options

  • Option A

    $I_A+I_B$

  • Option B

    √($I_A²+I_B²)$

  • Option C

    √[($I_A²+I_B²)/2]$

  • Option D

    (1/2)√($I_A²+I_B²)$

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• IntegereasyWork , Power and Energyquestion based on work

  A particle moves along a straight line under force F=α+βx², where β=-12 SI units. If the work done from x=0 to x=1 m is 12 J, α is:

  Your answer

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• IntegermediumMagnetic effect of currentbiot savart law and magnetic field due to straight conductor ,arc and ring

  A square current loop of side 1/√2 m carries current 5 A. The magnetic field at its centre, in μT, is:

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• MCQmediumRotational Motionangular momentum in pure rotation and its conservation

  A body of mass m is projected with speed v₀ at 45° to the horizontal. Its angular momentum about the point of projection at the highest point is:

  Options

  • Option A

    mv₀³/(4g)

  • Option B

    mv₀³/(4√2 g)

  • Option C

    mv₀²/(4√2 g)

  • Option D

    mv₀³/(2√2 g)

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