JEE Mains 2025 29 Jan Morning Shift physics questions with solutions

Showing 1–10 of 21 questions

• 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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• MCQmediumUnit dimension and errorDimension and its application

  The velocity of a particle moving on a straight line varies as v=At²+Bt/(C+t), where A, B and C are constants. The dimensions of ABC are:

  Options

  • Option A

    L²T⁻²

  • Option B

    L²T⁻¹

  • Option C

    L²T⁻³

  • Option D

    LT⁻³

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• MCQmediumsemiconductorlogic gate

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

  Which graph correctly represents kinetic energy K of photoelectrons versus wavelength λ of incident light in photoelectric effect?

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQeasySimple Harmonic Motionangular shm and its time period

  Assertion: At the peak of a mountain, the time period of a pendulum increases. Reason: The time period of a pendulum increases when g decreases.

  Options

  • Option A

    Assertion is correct, Reason is incorrect

  • Option B

    Assertion is incorrect, Reason is correct

  • Option C

    Assertion is incorrect, Reason is incorrect

  • Option D

    Assertion is correct, Reason is correct

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• MCQmediumThermodyanmicsfirst law of thermodynamics

  Heat supplied to 0.5 mol of a monoatomic ideal gas at constant pressure is 500 J. Initial temperature is 27°C. Find ΔU and ΔT. Use R≈8.33 J mol⁻¹ K⁻¹.

  Options

  • Option A

    300 J, 48°C

  • Option B

    150 J, 24°C

  • Option C

    180 J, 16°C

  • Option D

    210 J, 18°C

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

  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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• MCQmediumCenter of maas , Momentum and Collisioncollision and types of collision

  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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• IntegereasyFluid Mechanicspascal law and buoyant force

  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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• MCQmediumElectrostaticselectric dipole and dipole moment

  An electric dipole of dipole moment P and moment of inertia I is placed with $\vec{p}$ parallel to a uniform electric field $\vec{E}$. It is rotated slightly and released. The time period of small oscillation is:

  Options

  • Option A

    2π√(I/PE)

  • Option B

    (1/2π)√(PE/I)

  • Option C

    2π√(IE/P)

  • Option D

    (1/2π)√(PI/E)

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