JEE Advanced 2025 Paper 2 physics questions with solutions

Showing 1–10 of 16 questions

• NumericdifficultWave OpticsYoung's Double-Slit Experiment (YDSE)

  In Young's double-slit experiment, two glass wedges A and B with refractive indices 1.7 and 1.5 are placed in front of the slits as shown. Slit separation d = 2 mm, screen distance D = 2 m, total wedge thickness t = 12 μm, and l = 1 mm. Neglect refraction at the slanted interface. Find the shift of the central maximum in mm.

  

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• Multi-correctdifficultElectrostaticConductors & Electrostatic Properties

  A positive point charge 10⁻⁸ C is 20 cm from the center of a neutral conducting sphere of radius 10 cm. The sphere is grounded, the grounding is removed, and then the point charge is moved 10 cm farther away. Take 1/(4πε₀) = 9 × 10⁹ N m² C⁻². Which statements are correct?

  Select all that apply

  • Option A

    Before grounding, the electrostatic potential of the sphere is 450 V.

  • Option B

    Charge of magnitude 5 × 10⁻⁹ C flows because of grounding.

  • Option C

    After grounding is removed, the charge on the sphere is -5 × 10⁻⁹ C.

  • Option D

    The final electrostatic potential of the sphere is 300 V.

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• MCQdifficultElectrostaticElectric Flux & Gauss’s Law

  Two coaxial conducting cylinders of equal length ℓ have radii √2R and 2R. The inner cylinder carries charge Q, the outer cylinder is grounded, and the dielectric between them has κ = 5. An imaginary plane of length ℓ is at distance R from the common axis and parallel to it. Ignoring edge effects, find the electric flux through the plane.

  

  Options

  • Option A

    Q/(30ε₀)

  • Option B

    Q/(15ε₀)

  • Option C

    Q/(60ε₀)

  • Option D

    Q/(120ε₀)

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

  A ground-state hydrogen atom at rest absorbs a photon of frequency ν₁ and ejects an electron with kinetic energy 10 eV. The electron combines with a positron at rest to form ground-state positronium, emitting a photon of frequency ν₂. The positronium center of mass has kinetic energy 5 eV. Find h(ν₁ - ν₂) in eV.

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• NumericdifficultThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  An ideal monatomic gas of n moles follows the cycle WXYZW shown in the V-T diagram. Successive processes are adiabatic and isobaric. Volumes at W, X and Y are 64 cm³, 125 cm³ and 250 cm³. Given that nRT at W is 1 J, find the heat absorbed along XY in joules

  

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• NumericdifficultThermodynamicsKinetic Theory of Gases and Molecular Properties

  A thermally isolated container of length L is divided by a thermally conducting movable piston of area A. The left and right compartments contain 3/2 and 1 moles of ideal gas. A spring of constant k and natural length 2L/5 connects the left wall to the piston. At equilibrium the piston is at L/2. If the right-side pressure is P = (kL/A)α, find α.

  

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• Multi-correctdifficultThermodynamicsThermodynamic Cycles, Heat Engines, Efficiency and Second Law of Thermodynamics

  A Carnot engine operates between a hot reservoir at 1000 K and a cold reservoir, with efficiency 0.4. It absorbs 150 J per cycle. Its entire work output runs a heat pump of coefficient of performance 10 whose hot reservoir is at 300 K. Which statements are correct?

  Select all that apply

  • Option A

    Work extracted from the Carnot engine in one cycle is 60 J.

  • Option B

    Temperature of the cold reservoir of the Carnot engine is 600 K.

  • Option C

    Temperature of the cold reservoir of the heat pump is 270 K.

  • Option D

    Heat supplied to the hot reservoir of the heat pump in one cycle is 540 J.

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• MCQdifficultSimple Harmonic MotionAngular Simple Harmonic Motion and Its Time Period

  A uniform rod OO′ of length l is hinged at O. Two identical massless springs are attached as in Fig. 1: one at l/2 and one at l. In Fig. 2 both springs are attached at l/2. Ignoring gravity and for small angular oscillations, the frequencies are f₁ and f₂. Find f₁/f₂.

  

  Options

  • Option A

    2

  • Option B

    √2

  • Option C

    √(5/2)

  • Option D

    √(2/5)

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

  A 200 g projectile is launched in a viscous medium at 60° with initial speed 270 m s⁻¹. It experiences linear drag F = -cv, where c = 0.1 kg s⁻¹. It hits a vertical wall after 2 s. Taking e = 2.7, find the horizontal distance of the wall from the point of projection in metres.

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• MCQdifficultGravitationSatellites, Orbital Motion & Kepler’s Laws

  A star of mass m₂ revolves in a circular orbit around a much heavier star of mass m₁, with m₁ ≫ m₂. The heavier star slowly acquires mass from the lighter star at a constant rate γ kg s⁻¹, with no other mass loss. If the separation is r, which expression gives (1/r)(dr/dt)?

  Options

  • Option A

    -3γ/(2m₂)

  • Option B

    -2γ/m₂

  • Option C

    -2γ/m₁

  • Option D

    -3γ/(2m₁)

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