JEE Mains 2025 28 Jan Morning Shift physics questions with solutions

Showing 1–10 of 20 questions

• MCQmediumsemiconductorlogic gate

  For the logic circuit shown in the original question figure, which option represents the equivalent gate?

  

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQmediumCapacitorRC circuit

  Two capacitors C₁ and C₂ are connected separately across the same battery. Their charge-versus-time curves in the original figure show final charge Q₂>Q₁. If stored energies are U₁ and U₂, which is correct?

  

  Options

  • Option A

    C₁>C₂ and U₁>U₂

  • Option B

    C₁<C₂ and U₁<U₂

  • Option C

    C₁>C₂ and U₁<U₂

  • Option D

    C₁<C₂ and U₁>U₂

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• IntegermediumWave Opticsyoung's dubble slit experiments

  In YDSE, the 10th bright fringe is 10 mm from the central maximum for wavelength 600 nm. For wavelength 660 nm, the distance of the 10th bright fringe from the central maximum is:

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• MCQmediumThermodynamicskinetic therory of gaseous

  Which graph correctly represents root mean square speed $v_rms$ of an ideal gas versus absolute temperature T?

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQeasyCurrent electricityEquivalent Resistance & Networks

  Find the equivalent resistance across A and B for the resistor network shown in the original question figure.

  

  Options

  • Option A

    R

  • Option B

    R/6

  • Option C

    R/3

  • Option D

    R/9

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

  A photon of wavelength λ has energy E₀, equal to the kinetic energy of a proton of mass $m_p.$ The ratio $\lambda_{p}$/$\lambda_{ph}$of de Broglie wavelength of the proton to wavelength of the photon is:

  Options

  • Option A

    (1/c)√(2E₀/$m_p)$

  • Option B

    (1/c)√(E₀/(2$m_p))$

  • Option C

    (2/c)√(E₀/$m_p)$

  • Option D

    (1/2c)√(E₀/$m_p)$

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• MCQmediumCurrent electricityEquivalent Resistance & Networks

  A square and an equilateral triangle have the same perimeter a and the same resistance per unit length. Find the ratio of equivalent resistances between adjacent vertices, $R_square/R_triangle.$

  

  Options

  • Option A

    32/27

  • Option B

    27/32

  • Option C

    8/9

  • Option D

    9/8

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• MCQmediumThermodynamicscyclic process its effeciency ,second law of thermodynamics

  η₁, η₂ and η₃ are efficiencies of Carnot engines operating respectively between 473 K–273 K, 473 K–373 K and 373 K–273 K. Choose the correct relation.

  

  Options

  • Option A

    η₂+η₃>η₁

  • Option B

    η₂+η₃=η₁

  • Option C

    η₂+η₃<η₁

  • Option D

    η₁+η₂=η₃

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• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  Two thin prisms of re$fractive$ indices 1.54 and 1.72 are arranged so that their deviations cancel. If the first prism angle is 4°, find the second prism angle.

  Options

  • Option A

    2°

  • Option B

    3°

  • Option C

    4°

  • Option D

    3.5°

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• IntegermediumUnit dimension and errorDimension and its application

  The dimensions of Young's modulus per unit length are MᵃLᵇTᶜ. Find |a+b+c|.

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