JEE Mains 2025 29 Jan Morning Shift physics questions with solutions

Showing 1–10 of 21 questions

• MCQmediumsemiconductorLogic Gates & Boolean Operations

  Identify the logic gate represented by the circuit shown in the original question figure.

  

  Options

  • Option A

    OR Gate

  • Option B

    NAND Gate

  • Option C

    AND Gate

  • Option D

    NOR Gate

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• MCQmediumCenter of maas , Momentum and CollisionCollisions: Elastic & Inelastic

  A pendulum bob of mass m/2 is released from rest from the position shown, at 60° from the vertical, and collides elastically (e=1) with a stationary bob of mass m. Find the speed of the mass m immediately after collision.

  

  Options

  • Option A

    √(3gl/2)

  • Option B

    (2/3)√(gl)

  • Option C

    √(gl/3)

  • Option D

    (1/3)√(gl)

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• MCQmediumMagnetic effect of currentAmpere's Circuital Law and Its Applications

  An infinite solid cylindrical wire of radius R carries current I uniformly over its cross-section. At what distance from the centre is the magnetic field equal to μ₀I/(4πR)?

  

  Options

  • Option A

    R/2

  • Option B

    R

  • Option C

    4R

  • Option D

    0

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• MCQeasyKinematics part-3 Relative motionRiver problem

  A river flows at 9 km/h. A boat moves downstream with speed 27 km/h relative to water. A person in the boat throws a ball vertically upward at 10 m/s. Find the horizontal range of the ball as seen by an observer on the bank. Take g=10 m/s².

  Options

  • Option A

    10 m

  • Option B

    20 m

  • Option C

    25 m

  • Option D

    20√3 m

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• MCQeasyPhotoelectric effect and dual naturePhotoelectric Effect & Einstein's Equation

  Assertion: A negative potential is required to stop photoelectrons. Reason: The speed of an electron decreases when a negative retarding potential is applied in a photocell.

  Options

  • Option A

    Assertion correct, Reason false

  • Option B

    Assertion correct and Reason correct

  • Option C

    Assertion false, Reason correct

  • Option D

    Assertion false and Reason false

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• MCQeasyAtomic Structure and X-raysAtomic Structure & Bohr's Atomic Model

  If the radius of the first Bohr orbit of hydrogen is a₀, the radius of the second Bohr orbit is:

  Options

  • Option A

    8a₀

  • Option B

    4a₀

  • Option C

    2a₀

  • Option D

    6πa₀

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• MCQmediumProperties of solid and fluidElastic Properties of Solids: Stress, Strain and Elastic Moduli

  A ball is kept under sea at a depth of 2.5 km. If the bulk modulus of water is 2×10⁹ Pa, find the percentage decrease in volume. Take ρ=10³ kg/m³ and g=10 m/s².

  Options

  • Option A

    2%

  • Option B

    1.5%

  • Option C

    1.25%

  • Option D

    2.75%

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• IntegereasyFluid MechanicsPascal's Law, Buoyant Force and Archimedes' Principle

  In a hydraulic lift, piston areas are A₁=25 cm² and A₂=100 cm². If 100 N is applied normally on A₁, the force on A₂ is:

  Your answer

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• MCQmediumElectromagnetic InductionMutual Inductance, L-C Oscillations and Transformers

  Two coils of self-inductances L₁ and L₂ have mutual inductance M. For the current directions shown in the original figure, the induced emf in coil 1 is:

  

  Options

  • Option A

    -L₁(di₁/dt)+M(di₂/dt)

  • Option B

    -L₁(di₁/dt)-M(di₂/dt)

  • Option C

    -L₁(di₂/dt)+M(di₁/dt)

  • Option D

    -L₁(di₂/dt)-M(di₁/dt)

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• MCQmediumKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  Two projectiles are launched simultaneously from the same point with the same speed at angles (45°-α) and (45°+α). If their maximum heights are h₁ and h₂ respectively, then h₁/h₂ is:

  Options

  • Option A

    (1-sinα)/(1+sinα)

  • Option B

    (1-sin2α)/(1+sin2α)

  • Option C

    (1-tanα)/(1+tanα)

  • Option D

    (1-cosα)/(1+cosα)

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