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Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 4 April 2026, Shift 1, Physics Q32

Question 32 of 75 in this shift, Physics question 7 of 25, Section A.

The graph shows variation of stopping potential VoV_o with the frequency ν\nu of the incident radiation for three photosensitive metals X1X_1, X2X_2 and X3X_3. Which metal will give out electrons with greater kinetic energy, for the same wavelength of incident radiation?

The figure, in words

Graph of stopping potential VoV_o (vertical axis) vs frequency ν\nu (horizontal axis, ×1014\times10^{14} Hz): three parallel straight lines labelled X1X_1, X2X_2, X3X_3 with frequency-axis intercepts 1.01.0, 1.51.5 and 22 respectively.
  1. (1)X1X_1Official answer
  2. (2)X2X_2
  3. (3)X3X_3
  4. (4)All the metals will give out photo electrons with same kinetic energies.

Official answer

Option 1

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Photoelectric Effect
Idea tested
Comparative Graphs for Different Metals

Same topic in other shifts

All Photoelectric Effect questions
  1. 2 Apr 2026, Shift 1 · Q42For a certain metal, when monochromatic light of wavelength λ\lambda is incident, the stopping potential for photoelectrons is 3Vo3V_o.…MediumSingle correct
  2. 5 Apr 2026, Shift 1 · Q41Light source having wavelength 331 nm is used to generate photo-electrons whose stopping potential is 0.2 V. The work function of the used…EasySingle correct
  3. 8 Apr 2026, Shift 2 · Q38A monochromatic source of light operating at 15 kW emits 2.5×10222.5 \times 10^{22} photons/s. The region of an electromagnetic spectrum to…MediumSingle correct
  4. 8 Apr 2026, Shift 2 · Q43K1K_1 and K2K_2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength…MediumSingle correct
  5. 2 Apr 2025, Shift 1 · Q44A monochromatic light is incident on a metallic plate having work function ϕ\phi. An electron, emitted normally to the plate from a point…MediumSingle correct
  6. 3 Apr 2025, Shift 1 · Q43The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons isEasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.