JEE Mains 2026 5 April Evening Shift physics questions with solutions

Showing 1–10 of 25 questions

• MCQeasyPhotoelectric effect and dual natureDual Nature of Matter & de Broglie Wavelength

  An electron moves with speed v in free space and has de Broglie wavelength λ₀. On entering a medium, its speed decreases by 20%, while its mass is treated as unchanged and the motion remains non-relativistic. If its de Broglie wavelength in the medium is αλ₀, what is α?

  Options

  • Option A

    1.20

  • Option B

    1.00

  • Option C

    1.25

  • Option D

    0.75

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• MCQeasysemiconductorP–N Junction Diode & Forward–Reverse Bias

  In a semiconductor p-n junction, the doping concentration on the p-side is 10¹⁵ atoms·cm⁻³ and that on the n-side is 10¹⁸ atoms·cm⁻³. Which statement about the depletion-region widths is correct?

  Options

  • Option A

    The depletion widths on the two sides are equal

  • Option B

    The depletion region extends farther into the p-side than into the n-side

  • Option C

    The depletion region extends farther into the n-side than into the p-side

  • Option D

    No depletion region forms because the doping concentrations are unequal

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• MCQmediumMagnetic effect of currentMotion of Charged Particles in a Magnetic Field

  A particle of charge q and mass m is projected from the origin with initial velocity v = (v₀/√2)î+(v₀/√2)ĵ. The region 0 ≤ x ≤ L contains a uniform magnetic field B = B₀ k̂ and a position-dependent electric field E = E₀ exp(-λx) î, where λ is a positive constant. After the particle moves from x = 0 to x = L, what is the change in its kinetic energy?

  Options

  • Option A

    (qE₀/ λ)[1-exp(-λL)]

  • Option B

    (v₀qB₀ /2λ)[2-exp(-2λL)]

  • Option C

    -(qE₀ /λ)[1+exp(-λL)]

  • Option D

    q[(E₀+v₀B₀) /λ][1-exp(-λL /2)]

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• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  An ideal gas at pressure P and temperature T expands in such a way that PT³ remains constant throughout the process. What is the coefficient of volume expansion, defined along this process as β = (1 /V)(dV /dT)?

  Options

  • Option A

    2 / T

  • Option B

    1 /T

  • Option C

    4 /T

  • Option D

    3 / T

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• IntegermediumThermodynamicsHeat, Specific Heat Capacity, Latent Heat and Calorimetry

  The heat extracted from x grams of water initially at 50°C to cool it to 0°C is exactly sufficient to convert (1000-x) grams of water, also initially at 50°C, completely into steam at 100°C. Take the specific heat capacity of water as 4200 J·kg⁻¹·K⁻¹ and the latent heat of vaporisation as 2256 kJ·kg⁻¹. Find x to the nearest integer in grams.

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• IntegereasyAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series LCR circuit has R = 20 Ω, L = 1.6 H and C = 40 μF. It is connected to a variable-frequency AC source. If the inductive reactance at resonance is N ohms, find N.

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• MCQmediumCapacitorRC Circuits: Charging & Discharging

  In the circuit shown in the figure, a 2 μF capacitor is in a branch with a 4 Ω resistor, while the other branches contain a 2 Ω resistor and a 2 V source in series with a 6 Ω resistor. After steady state is reached, what is the potential difference across the capacitor?

  

  Options

  • Option A

    0.5 V

  • Option B

    1.5 V

  • Option C

    0 V

  • Option D

    2 V

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• MCQmediumSimple Harmonic MotionDisplacement, Velocity, Acceleration and Phasor Representation in SHM

  Match each time-dependent function in List I with the correct description in List II.

  List I:
  A. sin²(ωt)
  B. sin³(2ωt)
  C. sin(ωt)+cos(πωt)
  D. cos(ωt)+cos(2ωt)

  List II: I. Periodic with period π /ω, but not simple harmonic motion II. Periodic with period 2π /ω, but not simple harmonic motion III. Periodic with period π /ω and represents simple harmonic motion about its mean position IV. Non-periodic

  Choose the correct matching.

  Options

  • Option A

    A–III, B–I, C–IV, D–II

  • Option B

    A–II, B–I, C–III, D–IV

  • Option C

    A–III, B–II, C–IV, D–I

  • Option D

    A–II, B–I, C–IV, D–III

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

  In a Young double-slit experiment, the maximum fringe intensity is I₀. The slit separation is d = 5λ, where λ is the wavelength. The screen is at distance D = 10d from the slit plane. What is the intensity at the point on the screen lying exactly opposite one of the slits?

  Options

  • Option A

    I₀ / 4

  • Option B

    I₀ / 2

  • Option C

    I₀

  • Option D

    3I₀ / 4

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• MCQeasyProperties of solid and fluidSurface Tension, Surface Energy and Their Applications

  Eight identical spherical mercury drops, each of radius r, coalesce to form a single larger spherical drop. If S is the surface tension of mercury, how much surface energy is released during the coalescence?

  Options

  • Option A

    8πr²S

  • Option B

    16πr²S

  • Option C

    64πr²S

  • Option D

    4πr²S

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