JEE Main 2025 (Online) 22 jan morning Shift physics questions with solutions

Showing 1–10 of 20 questions

• MCQmediumGravitationGravitation, Gravitational Field & Potential Energy

  A solid sphere of mass M and radius R exerts gravitational force F on a point mass outside it. A concentric spherical mass M/7 is removed from the sphere. What is the new gravitational force?

  Options

  • Option A

    F/7

  • Option B

    6F/7

  • Option C

    5F/7

  • Option D

    3F/7

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  JEE Main 2025 (Online) 22 jan morning Shift

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• MCQmediumRotational MotionMoment of Inertia & Rotational Kinetic Energy

  From a uniform solid sphere of mass M and radius R, a concentric spherical cavity of radius R/2 is created. Find the moment of inertia about an axis passing through the common centre.

  

  Options

  • Option A

    31MR²/48

  • Option B

    31MR²/80

  • Option C

    13MR²/32

  • Option D

    21MR²/32

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  JEE Main 2025 (Online) 22 jan morning Shift

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• MCQmediumCapacitorCapacitors with Dielectrics

  Find the equivalent capacitance for the capacitor arrangement shown in the original question figure. The three dielectric constants are K₁, K₂ and K₃; plate area is A and separation is d.

  

  Options

  • Option A

    (Aε₀/d)[(K₁K₂+K₂K₃+K₃K₁)/(K₁+K₂)]

  • Option B

    (Aε₀/d)[(2K₁K₂+K₂K₃+K₃K₁)/(2(K₁+K₂))]

  • Option C

    (Aε₀/d)[(K₁K₂+K₂K₃+K₃K₁)/(2(K₁+K₂))]

  • Option D

    (Aε₀/2d)[(K₁K₂+K₂K₃+K₃K₁)/(K₁+K₂)]

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  JEE Main 2025 (Online) 22 jan morning Shift

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

  Light of wavelength 550 nm is incident on cerium and lithium surfaces. Their work functions are 1.9 eV and 2.5 eV respectively. Photoelectrons will be emitted from:

  Options

  • Option A

    Cerium only

  • Option B

    Lithium only

  • Option C

    Both surfaces

  • Option D

    Neither surface

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  JEE Main 2025 (Online) 22 jan morning Shift

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

  Find the dimensions of B/μ₀.

  Options

  • Option A

    [AL]

  • Option B

    [AL⁻¹]

  • Option C

    [MAL]

  • Option D

    [MALT⁻¹]

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  JEE Main 2025 (Online) 22 jan morning Shift

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• MCQeasyElectrostaticElectric Flux & Gauss’s Law

  A point charge q is placed at the edge of an imaginary cube of side a as shown in the original question figure.Find the net electric flux through the cube.

  

  Options

  • Option A

    q/(4ε₀)

  • Option B

    q/(8ε₀)

  • Option C

    q/(6ε₀)

  • Option D

    q/(2ε₀)

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

  The radius of the electron orbit in the ground state of hydrogen is a₀. The radius of the electron orbit in He⁺ in the third excited state is a. Find a in terms of a₀.

  Options

  • Option A

    a₀/8

  • Option B

    2a₀

  • Option C

    4a₀

  • Option D

    8a₀

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• IntegereasyWork , Power and EnergyVertical Circular Motion

  A particle shown in the original figure is just able to complete vertical circular motion.Find the ratio of its kinetic energy at point A to its kinetic energy at point B.

  

  Your answer

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  JEE Main 2025 (Online) 22 jan morning shiftkinematics previous year

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• MCQeasyCurrent electricityElectric Current, Drift Velocity & Resistance

  Which of the four graphs shown in the original question correctly represents the variation of resistivity ρ with temperature T for a conductor?

  Options

  • Option A

    

    Graph (1)

  • Option B

    

    Graph (2)

  • Option C

    

    Graph (3)

  • Option D

    

    Graph (4)

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• MCQmediumGeometrical opticsLenses, Lens Combinations & Silvered Lenses

  The equiconvex lens shown in the original figure is silvered on one side. Its μ and the radius magnitude of each curved surface is R. For what object distance from the lens will the image be formed on the object itself.

  

  Options

  • Option A

    μR

  • Option B

    R/μ

  • Option C

    R/(2μ-1)

  • Option D

    R/(2μ-2)

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