JEE Mains 2025 29 Jan Evening Shift physics questions with solutions

Showing 1–10 of 20 questions

• MCQeasyUnit dimension and errorDimension and its application

  Match the quantities with dimensions: A Angular momentum, B Force, C Energy, D Pressure; I [MLT⁻²], II [ML²T⁻¹], III [ML⁻¹T⁻²], IV [ML²T⁻²].

  Options

  • Option A

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

  • Option B

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

  • Option C

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

  • Option D

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

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• MCQmediumGeometrical opticsrefraction due to curved surface

  At a spherical refractive interface, an object in medium μ₁=1.3 is 13 cm from the surface and forms a real image in medium μ₂=1.4 that is twice in size. The radius of curvature is:

  Options

  • Option A

    3/2 cm

  • Option B

    2/3 cm

  • Option C

    $\frac{3}{4}$ cm

  • Option D

    4/3 cm

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

  For a hydrogen-like single-electron atom of atomic number Z, the frequency of revolution of the electron in the nth Bohr orbit is proportional to:

  Options

  • Option A

    Z/n²

  • Option B

    Z²/n³

  • Option C

    n³/Z

  • Option D

    Z/n

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• IntegereasyKinematics Part-1 (one dimension)Ghraphical problem of kinematics

  From the velocity-time graph in the original paper, velocity remains positive from t=0 to 4 s and the area under the graph is 30 m. The distance travelled is:

  

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• IntegereasyElectrostaticelectric dipole and dipole moment

  An electric dipole of moment 6×10⁻⁶ C·m is initially parallel to a uniform electric field of 10⁶ N/C. Work required to rotate it through 180° is:

  Your answer

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• MCQmediumGravitationAcceleration Due to Gravity & Escape Velocity

  For a planet, Earth's mass $M_e=8M_p$ and Earth's radius $R_e=2R_p.$ If Earth's escape speed is 11.2 km/s, the planet's escape speed is:

  Options

  • Option A

    11.2√2 km/s

  • Option B

    5.6 km/s

  • Option C

    5.6√2 km/s

  • Option D

    11.2 km/s

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

  A cube of side 10 cm has bulk modulus 1.4×10¹¹ Pa. It is subjected to an extra pressure of 7×10⁶ Pa. The magnitude of change in its volume is:

  Options

  • Option A

    0.03 mL

  • Option B

    0.3 mL

  • Option C

    0.05 mL

  • Option D

    0.2 mL

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• MCQmediumGeometrical opticsspherical mirror

  A concave mirror forms a real image three times the size of a real object. The distance between object and image is 20 cm. The radius of curvature of the mirror is:

  Options

  • Option A

    10 cm

  • Option B

    12 cm

  • Option C

    15 cm

  • Option D

    20 cm

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• MCQmediumWave Opticsinterferece of light and huygen principle

  A soap film on a ring of radius 3 cm evaporates. Light of wavelength 580 nm gives minimum transmission every 12 s. Re$fractive$ index is 1.45. The rate of evaporation is:

  Options

  • Option A

    1.5π×10⁻¹³ m³/s

  • Option B

    15π×10⁻¹³ m³/s

  • Option C

    3π×10⁻¹³ m³/s

  • Option D

    3π×10⁻¹² m³/s

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• MCQmediumCapacitorparallel plate capacitor ,cylindrical capacitor and spherical capacitor

  A 1 μF parallel-plate capacitor is charged to 20 V. Plate separation is 10 μm. The charge density on the plates is:

  Options

  • Option A

    17.7 nC/m²

  • Option B

    17.7 μC/m²

  • Option C

    8.85 nC/m²

  • Option D

    4.42 μC/m²

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