JEE Advanced 2025 Paper 1 physics questions with solutions

Showing 1–10 of 16 questions

• NumericdifficultElectromagnetic wavedisplacement current and properties of electromagnetic wave

  A cube of unit volume contains 35 × 10⁷ photons of frequency 10¹⁵ Hz. Treating their total energy as the average electromagnetic-wave energy in the same volume, the magnetic-field amplitude is α × 10⁻⁹ T. Given μ₀ = 4π × 10⁻⁷ T m A⁻¹, h = 6 × 10⁻³⁴ J s and π = 22/7, find α.

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• Multi-correctdifficultWave Motionreflaction ,refraction of string wave and superposition of wave

  Three strings S₁, S₂ and S₃ have linear mass densities μ, 4μ and 16μ, respectively, and are connected in series as shown. A generator sends y = y₀ cos(ωt - kx) along S₁. Which statements are correct?

  

  Select all that apply

  • Option A

    At the first reflection from P: y = α₁y₀ cos(ωt + kx + π), where α₁ > 0.

  • Option B

    At the first transmission through P: y = α₂y₀ cos(ωt - kx), where α₂ > 0.

  • Option C

    At the first reflection from Q: y = α₃y₀ cos(ωt - kx + π), where α₃ > 0.

  • Option D

    At the first transmission through Q: y = α₄y₀ cos(ωt - 4kx), where α₄ > 0.

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• MatchdifficultAC Circuitsseries combination of ac circuit and L-C-R circuit

  An AC source V(t) = 300 sin(400t) V is connected to each load in List-I. Match each load with the corresponding current-time graph in List-II.

  

  List 1

  1. 

  2. 

  3. 

  4. 

  5. .

  List 2

  1. 

  2. 

  3. 

  4. 

  5. 

  Options

  • Option A

    P→3, Q→5, R→2, S→1

  • Option B

    P→1, Q→5, R→2, S→3

  • Option C

    P→3, Q→4, R→2, S→1

  • Option D

    P→1, Q→4, R→2, S→5

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• Multi-correctdifficultElectromagnetic Inductionmotional emf and induced emf in rotating rod

  A conducting square loop of side L, mass M and resistance R enters a region y ≥ 0 containing uniform magnetic field B = B₀ k̂ with initial velocity v₀ ĵ. Define K = B₀²L²/(RM). Ignoring self-inductance and gravity, which statements are correct?

  Image

  Select all that apply

  • Option A

    If v₀ = 1.5KL, the loop stops before entering completely into the magnetic-field region.

  • Option B

    When the complete loop is inside the magnetic-field region, the net force on the loop is zero.

  • Option C

    If v₀ = KL/10, the loop comes to rest at t = (1/K) ln(5/2).

  • Option D

    If v₀ = 3KL, the complete loop enters the magnetic-field region at t = (1/K) ln(3/2).

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• MCQdifficultElectromagnetic Inductionfaradays law and question based on it

  A conducting square loop initially lies in the XZ plane with its lower edge hinged along the X-axis. Only in the region y ≥ 0 there is a time-dependent magnetic field B(t) = B₀ cos(ωt) k̂. At t = 0 the loop starts rotating with angular speed ω about the X-axis in the clockwise direction as viewed from +X. Ignoring self-inductance and gravity, choose the correct induced e.m.f. V versus time graph.

  

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQmediumUnit dimension and errorvernier callipers and screw gauge

  Figure 1 shows the main-scale and Vernier-scale configuration before measurement. Figure 2 shows the configuration while measuring the diameter D of a tube. The measured value of D is:

  

  Options

  • Option A

    0.12 cm

  • Option B

    0.11 cm

  • Option C

    0.13 cm

  • Option D

    0.14 cm

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• MatchdifficultElectrostaticelectric dipole and dipole moment

  Four configurations of two ideal electric dipoles are shown in List-I. Each dipole has magnitude p and the dipoles are 2r apart along x. X is the midpoint. Match each configuration with the resultant electric field at X.

  Image

  List 1

  1. 

  2. 

  3. 

  4. 

  5. .

  List 2

  1. 1. 1. E = 0

  2. 1. 2. E = -p ĵ/(2πε₀r³)

  3. 3. 3. E = -p(î - ĵ)/(4πε₀r³)

  4. 1. 4. E = p(2î - ĵ)/(4πε₀r³)

  5. 1. 5. E = p î/(πε₀r³)

  Options

  • Option A

    P→3, Q→1, R→2, S→4

  • Option B

    P→4, Q→5, R→3, S→1

  • Option C

    P→2, Q→1, R→4, S→5

  • Option D

    P→2, Q→1, R→3, S→5

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• MatchdifficultNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  Match the functional dependence of energy E on atomic number Z in List-I with the appropriate phenomenon in List-II.

  List 1

  1. P. E ∝ Z²

  2. Q. E ∝ (Z - 1)²

  3. R. E ∝ Z(Z - 1)

  4. S. E is practically independent of Z

  5. .

  List 2

  1. 1. 1. Energy of characteristic x-rays

  2. 1. 2. Electrostatic part of nuclear binding energy for stable nuclei with mass numbers 30 to 170

  3. 3. 3. Energy of continuous x-rays

  4. 4. 4. Average nuclear binding energy per nucleon for stable nuclei with mass numbers 30 to 170

  5. 5. 5. Energy of radiation from electronic transitions in hydrogen-like atoms

  Options

  • Option A

    P→4, Q→3, R→1, S→2

  • Option B

    P→5, Q→2, R→1, S→4

  • Option C

    P→5, Q→1, R→2, S→4

  • Option D

    P→3, Q→2, R→1, S→5

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• NumericmediumSimple Harmonic Motiondisplacement ,velocity and acceleration ,phasor diagram

  A person in an elevator weighs a 50 kg object. The height of the elevator is y = 8[1 + sin(2πt/T)] m, where T = 40π s. Taking g = 10 m s⁻², find the maximum variation of the object's observed weight in newtons.

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

  In a scattering experiment, a particle of mass 2m collides elastically with a particle of mass m initially at rest. The maximum angular deviation θ of the heavier particle is:

  

  Options

  • Option A

    π

  • Option B

    tan⁻¹(1/2)

  • Option C

    π/3

  • Option D

    π/6

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