JEE Mains 2024 31 Jan Morning Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQmediumGeometrical opticsprism and thin prism

  The refractive index of a prism with apex angle A is cot(A/2). The angle of minimum deviation is:

  Options

  • Option A

    δₘ = 180° - A

  • Option B

    δₘ = 180° - 3A

  • Option C

    δₘ = 180° - 4A

  • Option D

    δₘ = 180° - 2A

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• NumericmediumProperties of solid and fluidpropertes of solid stress ,strain and modulus of elasticity

  The depth below the surface of sea to which a rubber ball should be taken so as to decrease its volume by 0.02% is _____ m. [Take density of sea water = 10³ kg m⁻³, bulk modulus of rubber = 9 × 10⁸ N m⁻², and g = 10 m s⁻²]

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• MCQeasyThermodynamicsthermodynmic process and work done

  The given figure represents two isobaric processes for the same mass of an ideal gas. Then:

  

  Options

  • Option A

    P₂ ≥ P₁

  • Option B

    P₂ > P₁

  • Option C

    P₁ = P₂

  • Option D

    P₁ > P₂

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• MCQeasyCurrent electricityElectric Current, Drift Velocity & Resistance

  If the percentage errors in measuring the length and the diameter of a wire are 0.1% each, the percentage error in measuring its resistance will be:

  Options

  • Option A

    0.2%

  • Option B

    0.3%

  • Option C

    0.1%

  • Option D

    0.144%

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• NumericmediumElectromagnetic InductionMutual induction and L-C oscillations,transformer

  A small square loop of wire of side ℓ is placed inside a large square loop of wire of side L, where L = ℓ². The loops are coplanar and their centers coincide. The value of mutual inductance of the system is √x × 10⁻⁷ H, where x = ____.

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• MCQmediumElectromagnetic wavedisplacement current and properties of electromagnetic wave

  In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5 × 10¹⁰ Hz and an amplitude of 50 V m⁻¹. The total average energy density of the electromagnetic field of the wave is: [Use ε₀ = 8.85 × 10⁻¹² C² N⁻¹ m⁻²]

  Options

  • Option A

    1.106 × 10⁻⁸ J m⁻³

  • Option B

    4.425 × 10⁻⁸ J m⁻³

  • Option C

    2.212 × 10⁻⁸ J m⁻³

  • Option D

    2.212 × 10⁻¹⁰ J m⁻³

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• MCQmediumUnit dimension and errorDimension and its application

  A force is represented by F = ax² + bt¹ᐟ², where x = distance and t = time. The dimensions of b²/a are:

  Options

  • Option A

    [ML³T⁻³]

  • Option B

    [MLT⁻²]

  • Option C

    [ML⁻¹T⁻¹]

  • Option D

    [ML²T⁻³]

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• MCQmediumPhotoelectric effect and dual nature of matterquestion based on photoelectric effect

  When a metal surface is illuminated by light of wavelength λ, the stopping potential is 8 V. When the same surface is illuminated by light of wavelength 3λ, stopping potential is 2 V. The threshold wavelength for this surface is:

  Options

  • Option A

    5λ

  • Option B

    3λ

  • Option C

    9λ

  • Option D

    4.5λ

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• NumericeasyNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  The mass defect in a particular reaction is 0.4 g. The amount of energy liberated is n × 10⁷ kWh, where n = _____. [Speed of light = 3 × 10⁸ m s⁻¹]

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• MCQmediumElectrostaticElectric field intensity

  Two charges q and 3q are separated by a distance r in air. At a distance x from charge q, the resultant electric field is zero. The value of x is:

  Options

  • Option A

    r/(1 + √3)

  • Option B

    r/[3(1 + √3)]

  • Option C

    r/(1 + √3)

  • Option D

    r(1 + √3)

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