JEE Mains 2025 23 Jan Morning Shift physics questions with solutions

Showing 1–10 of 19 questions

• MCQmediumWork , Power and EnergyWork Done by Forces

  A particle moves along x=y from (0,0) to (2,2) in the force field $\overrightarrow{F}$=x³y î+y² ĵ. The work done is:

  Options

  • Option A

    173/15

  • Option B

    136/15

  • Option C

    139/17

  • Option D

    171/17

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• IntegermediumCenter of maas , Momentum and CollisionCentre of Mass & Its Calculation

  From a uniform circular disc of radius 20 cm, a circular portion of radius 5 cm is removed internally so that the small circle is tangent to the outer circumference. The magnitude of shift of the centre of mass is:

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• MCQeasyUnits, Dimensions, Measurements and ErrorsDimensional Analysis and Its Applications

  Electric flux φ is related to linear charge density λ and surface charge density σ as φ=αλ+βσ, where α and β have appropriate dimensions. The dimension of β/α is:

  Options

  • Option A

    Displacement

  • Option B

    Area

  • Option C

    Electric field

  • Option D

    Velocity

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• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  The adiabatic constant γ of a gas is 3/2. Its initial temperature is 0°C and its volume is reduced adiabatically to one-fourth. The new temperature is:

  Options

  • Option A

    0 K

  • Option B

    273 K

  • Option C

    546°C

  • Option D

    546 K

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• IntegereasyThermodynamicsHeat, Specific Heat Capacity, Latent Heat and Calorimetry

  A bullet of kinetic energy 125 J strikes a lead block. Half its kinetic energy becomes heat and raises the block temperature by 50°C. If specific heat is 0.1 J g⁻¹ °C⁻¹ and block mass is m grams, find 2m.

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• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  Match the thermodynamic conditions: P: volume change is zero; Q: pressure is constant; R: no heat is exchanged; S: work done by gas equals heat supplied. Column-II: (i) ΔW=0, (ii) ΔQ=0, (iii) Isobaric, (iv) Isothermal.

  Options

  • Option A

    P(iv), Q(iii), R(i), S(ii)

  • Option B

    P(i), Q(iii), R(ii), S(iv)

  • Option C

    P(ii), Q(iii), R(iv), S(i)

  • Option D

    P(ii), Q(iii), R(i), S(iv)

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• MCQeasyRotational MotionRolling Motion on Inclined Planes

  A uniform solid sphere rolls without slipping from rest through the same vertical height on inclines of 30° and 45°, attaining speeds v₁ and v₂ respectively. The ratio v₁²/v₂² is:

  Options

  • Option A

    1

  • Option B

    5/2

  • Option C

    2/5

  • Option D

    √3/√2

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• MCQeasyElectromagnetic InductionMutual Inductance, L-C Oscillations and Transformers

  A 12 V DC source, a 3 H ideal inductor and a resistor R=12 Ω are connected in series. Find the steady-state current.

  

  Options

  • Option A

    2 A

  • Option B

    1 A

  • Option C

    3 A

  • Option D

    4 A

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• MCQmediumSimple Harmonic MotionTime Period of Linear Simple Harmonic Motion

  A cube of side 10 cm and mass 10 g oscillates vertically in water of density 10³ kg/m³. Take g=10 m/s². Find its time period.

  Options

  • Option A

    π/25 s

  • Option B

    π/50 s

  • Option C

    π/100 s

  • Option D

    2π/25 s

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• MCQmediumGeometrical opticsRefraction at Spherical Surfaces

  Two objects are at equal distances from opposite surfaces of a transparent sphere of radius R and re$fractive$ index μ, such that the image of one object is formed on the other. The object distance from the surface is:

  Options

  • Option A

    R/μ

  • Option B

    R/(μ-1)

  • Option C

    R

  • Option D

    R/(μ+1)

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