JEE Mains 2025 23 Jan Morning Shift physics questions with solutions

Showing 1–10 of 19 questions

• MCQeasyGravitationGravitation, Gravitational Field & Potential Energy

  The ratio of electric force to gravitational force between particles of charges q₁,q₂ and masses m₁,m₂ is:

  Options

  • Option A

    4πε₀m₁m₂G/(q₁q₂)

  • Option B

    4πε₀Gm₁m₂/(q₁q₂r⁴)

  • Option C

    q₁q₂r⁴/(4πε₀Gm₁m₂)

  • Option D

    q₁q₂/(4πε₀Gm₁m₂)

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyProperties of solid and fluidproperties of fluid and surface tension

  Statement-I: Hot water is less viscous than cold water. Statement-II: Surface tension of a soap bubble is more than that of a drop of water.

  Options

  • Option A

    Both statements are true

  • Option B

    Statement-I is true and Statement-II is false

  • Option C

    Statement-I is false and Statement-II is true

  • Option D

    Both statements are false

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyCapacitorRC circuit

  An initially uncharged capacitor C is connected in series with resistance R and a DC source. The key is closed at t=0. Choose the incorrect statement at t=0.

  

  Options

  • Option A

    Current in the circuit is zero

  • Option B

    Voltage across capacitor is minimum

  • Option C

    Current in the circuit is maximum

  • Option D

    Voltage across resistance is maximum

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyUnit dimension and errorDimension and its application

  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

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQmediumNuclear physicsradioactivity and law of decay

  In radioactive decay, λ₂=3λ₁. Initially the numbers of nuclei of A₁ and A₂ are equal. Find N₁/N₂ after one half-life of A₂.

  Options

  • Option A

    2^(1/3)

  • Option B

    2^(2/3)

  • Option C

    2

  • Option D

    2^(5/3)

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyRotational Motionrolling on inclined surface

  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

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQmediumElectromagnetic wavedisplacement current and properties of electromagnetic wave

  For an electromagnetic wave, $\vec{E}$=E₀(4î-3ĵ)cos(ωt-kz). Which magnetic field is correct?

  Options

  • Option A

    $\vec{B}$=(E₀/c)(3î+4ĵ)cos(ωt-kz)

  • Option B

    $\vec{B}$=(E₀/c)(-3î-4ĵ)cos(ωt-kz)

  • Option C

    $\vec{B}$=(E₀/c)(3î-4ĵ)sin(ωt-kz)

  • Option D

    $\vec{B}$=(E₀/c)(-3î-4ĵ)sin(ωt-kz)

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQmediumGeometrical opticsrefraction due to curved surface

  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)

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyElectromagnetic InductionMutual induction and L-C oscillations,transformer

  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

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →
• MCQeasyKinematics Part-1 (one dimension)Ghraphical problem of kinematics

  

  The velocity-time graph of a particle is a straight line from v=200 m/s at t=0 to v=400 m/s at t=2 s. Find the distance travelled in the first 0.5 s.

  Options

  • Option A

    125 m

  • Option B

    112.5 m

  • Option C

    137.5 m

  • Option D

    150 m

  Check answerShow answer

  JEE Mains 2025 23 Jan Morning Shift

  Open question & full solution →